/**
* Method to compute the bond futures security results with the price computed as the cheapest
* forward.
*/
public final class BondFuturesSecurityHullWhiteNumericalIntegrationMethod {
/** Creates the method unique instance. */
private static final BondFuturesSecurityHullWhiteNumericalIntegrationMethod INSTANCE =
new BondFuturesSecurityHullWhiteNumericalIntegrationMethod();
/**
* Return the method unique instance.
*
* @return The instance.
*/
public static BondFuturesSecurityHullWhiteNumericalIntegrationMethod getInstance() {
return INSTANCE;
}
/** Constructor. */
private BondFuturesSecurityHullWhiteNumericalIntegrationMethod() {}
/** The model used in computations. */
private static final HullWhiteOneFactorPiecewiseConstantInterestRateModel MODEL =
new HullWhiteOneFactorPiecewiseConstantInterestRateModel();
/** The cash flow equivalent calculator used in computations. */
private static final CashFlowEquivalentCalculator CFEC =
CashFlowEquivalentCalculator.getInstance();
/** Minimal number of integration steps in the replication. */
private static final int NB_INTEGRATION = 15;
/** Function to compute the minimum of an array. */
private static final Min MIN_FUNCTION = new Min();
/**
* Computes the future price from the curves used to price the underlying bonds and a Hull-White
* one factor model. Computation by numerical integration.
*
* @param futures The future security.
* @param data The curve and Hull-White parameters.
* @return The future price.
*/
public double price(
final BondFuturesSecurity futures, final HullWhiteIssuerProviderInterface data) {
ArgumentChecker.notNull(futures, "Futures");
ArgumentChecker.notNull(data, "Hull-White/Issuer provider");
final Currency ccy = futures.getCurrency();
final LegalEntity issuer = futures.getDeliveryBasketAtDeliveryDate()[0].getIssuerEntity();
final double expiryTime = futures.getNoticeLastTime();
final double deliveryTime = futures.getDeliveryLastTime();
final int nbBonds = futures.getDeliveryBasketAtDeliveryDate().length;
final int[] nbPayments = new int[nbBonds];
final AnnuityPaymentFixed[] cfe = new AnnuityPaymentFixed[nbBonds];
for (int loopb = 0; loopb < nbBonds; loopb++) {
cfe[loopb] =
futures.getDeliveryBasketAtDeliveryDate()[loopb].accept(
CFEC, data.getMulticurveProvider());
nbPayments[loopb] = cfe[loopb].getNumberOfPayments();
final PaymentFixed[] payments = new PaymentFixed[nbPayments[loopb] + 1];
payments[0] =
new PaymentFixed(
ccy,
deliveryTime,
-futures.getDeliveryBasketAtDeliveryDate()[loopb].getAccruedInterest());
System.arraycopy(cfe[loopb].getPayments(), 0, payments, 1, nbPayments[loopb]);
cfe[loopb] = new AnnuityPaymentFixed(payments);
}
final double[][] alpha = new double[nbBonds][];
final double[][] beta = new double[nbBonds][];
final double[][] df = new double[nbBonds][];
final double[][] discountedCashFlow = new double[nbBonds][];
for (int loopb = 0; loopb < nbBonds; loopb++) {
alpha[loopb] = new double[nbPayments[loopb] + 1];
beta[loopb] = new double[nbPayments[loopb] + 1];
df[loopb] = new double[nbPayments[loopb] + 1];
discountedCashFlow[loopb] = new double[nbPayments[loopb] + 1];
for (int loopcf = 0; loopcf < cfe[loopb].getNumberOfPayments(); loopcf++) {
alpha[loopb][loopcf] =
MODEL.alpha(
data.getHullWhiteParameters(),
0.0,
expiryTime,
deliveryTime,
cfe[loopb].getNthPayment(loopcf).getPaymentTime());
beta[loopb][loopcf] =
MODEL.futuresConvexityFactor(
data.getHullWhiteParameters(),
expiryTime,
cfe[loopb].getNthPayment(loopcf).getPaymentTime(),
deliveryTime);
df[loopb][loopcf] =
data.getIssuerProvider()
.getDiscountFactor(issuer, cfe[loopb].getNthPayment(loopcf).getPaymentTime());
discountedCashFlow[loopb][loopcf] =
df[loopb][loopcf]
/ df[loopb][0]
* cfe[loopb].getNthPayment(loopcf).getAmount()
* beta[loopb][loopcf]
/ futures.getConversionFactor()[loopb];
}
}
// Integration
final FuturesIntegrant integrant = new FuturesIntegrant(discountedCashFlow, alpha);
final double limit = 10.0;
final double absoluteTolerance = 1.0E-2;
final double relativeTolerance = 1.0E-6;
final RungeKuttaIntegrator1D integrator =
new RungeKuttaIntegrator1D(absoluteTolerance, relativeTolerance, NB_INTEGRATION);
double price = 0.0;
try {
price = 1.0 / Math.sqrt(2.0 * Math.PI) * integrator.integrate(integrant, -limit, limit);
} catch (final Exception e) {
throw new RuntimeException(e);
}
return price;
}
/** Inner class to implement the integration used in price replication. */
private static final class FuturesIntegrant extends Function1D<Double, Double> {
private final double[][] _discountedCashFlow;
private final double[][] _alpha;
private final int _nbBonds;
/**
* Constructor to the integrant function.
*
* @param discountedCashFlow The discounted cash flows.
* @param alpha The bond volatilities.
*/
public FuturesIntegrant(final double[][] discountedCashFlow, final double[][] alpha) {
_discountedCashFlow = discountedCashFlow;
_alpha = alpha;
_nbBonds = discountedCashFlow.length;
}
@Override
public Double evaluate(final Double x) {
double[] bond = new double[_nbBonds];
for (int loopb = 0; loopb < _nbBonds; loopb++) {
for (int loopcf = 0; loopcf < _discountedCashFlow[loopb].length; loopcf++) {
bond[loopb] +=
_discountedCashFlow[loopb][loopcf]
* Math.exp(-(x + _alpha[loopb][loopcf]) * (x + _alpha[loopb][loopcf]) / 2.0);
}
}
return MIN_FUNCTION.evaluate(bond);
}
}
}
/** Tests related to the pricing of physical delivery swaption in Hull-White one factor model. */
public class SwaptionPhysicalFixedIborHullWhiteMethodTest {
private static final MulticurveProviderDiscount MULTICURVES =
MulticurveProviderDiscountDataSets.createMulticurveEurUsd();
private static final IborIndex EURIBOR6M =
MulticurveProviderDiscountDataSets.getIndexesIborMulticurveEurUsd()[1];
private static final Currency EUR = EURIBOR6M.getCurrency();
private static final Calendar CALENDAR = MulticurveProviderDiscountDataSets.getEURCalendar();
private static final HullWhiteOneFactorPiecewiseConstantParameters HW_PARAMETERS =
HullWhiteDataSets.createHullWhiteParameters();
private static final HullWhiteOneFactorProviderDiscount HW_MULTICURVES =
new HullWhiteOneFactorProviderDiscount(MULTICURVES, HW_PARAMETERS, EUR);
private static final ZonedDateTime REFERENCE_DATE = DateUtils.getUTCDate(2011, 7, 7);
// Swaption 5Yx5Y
private static final int SPOT_LAG = EURIBOR6M.getSpotLag();
private static final int SWAP_TENOR_YEAR = 5;
private static final Period SWAP_TENOR = Period.ofYears(SWAP_TENOR_YEAR);
private static final GeneratorSwapFixedIbor EUR1YEURIBOR6M =
GeneratorSwapFixedIborMaster.getInstance().getGenerator("EUR1YEURIBOR6M", CALENDAR);
private static final ZonedDateTime EXPIRY_DATE = DateUtils.getUTCDate(2016, 7, 7);
private static final boolean IS_LONG = true;
private static final ZonedDateTime SETTLEMENT_DATE =
ScheduleCalculator.getAdjustedDate(EXPIRY_DATE, SPOT_LAG, CALENDAR);
private static final double NOTIONAL = 100000000; // 100m
private static final double RATE = 0.0175;
private static final boolean FIXED_IS_PAYER = true;
private static final SwapFixedIborDefinition SWAP_PAYER_DEFINITION =
SwapFixedIborDefinition.from(
SETTLEMENT_DATE, SWAP_TENOR, EUR1YEURIBOR6M, NOTIONAL, RATE, FIXED_IS_PAYER);
private static final SwapFixedIborDefinition SWAP_RECEIVER_DEFINITION =
SwapFixedIborDefinition.from(
SETTLEMENT_DATE, SWAP_TENOR, EUR1YEURIBOR6M, NOTIONAL, RATE, !FIXED_IS_PAYER);
private static final SwaptionPhysicalFixedIborDefinition SWAPTION_LONG_PAYER_DEFINITION =
SwaptionPhysicalFixedIborDefinition.from(EXPIRY_DATE, SWAP_PAYER_DEFINITION, IS_LONG);
private static final SwaptionPhysicalFixedIborDefinition SWAPTION_LONG_RECEIVER_DEFINITION =
SwaptionPhysicalFixedIborDefinition.from(EXPIRY_DATE, SWAP_RECEIVER_DEFINITION, IS_LONG);
private static final SwaptionPhysicalFixedIborDefinition SWAPTION_SHORT_PAYER_DEFINITION =
SwaptionPhysicalFixedIborDefinition.from(EXPIRY_DATE, SWAP_PAYER_DEFINITION, !IS_LONG);
private static final SwaptionPhysicalFixedIborDefinition SWAPTION_SHORT_RECEIVER_DEFINITION =
SwaptionPhysicalFixedIborDefinition.from(EXPIRY_DATE, SWAP_RECEIVER_DEFINITION, !IS_LONG);
private static final SwapFixedCoupon<Coupon> SWAP_RECEIVER =
SWAP_RECEIVER_DEFINITION.toDerivative(REFERENCE_DATE);
private static final SwaptionPhysicalFixedIbor SWAPTION_LONG_PAYER =
SWAPTION_LONG_PAYER_DEFINITION.toDerivative(REFERENCE_DATE);
private static final SwaptionPhysicalFixedIbor SWAPTION_LONG_RECEIVER =
SWAPTION_LONG_RECEIVER_DEFINITION.toDerivative(REFERENCE_DATE);
private static final SwaptionPhysicalFixedIbor SWAPTION_SHORT_PAYER =
SWAPTION_SHORT_PAYER_DEFINITION.toDerivative(REFERENCE_DATE);
private static final SwaptionPhysicalFixedIbor SWAPTION_SHORT_RECEIVER =
SWAPTION_SHORT_RECEIVER_DEFINITION.toDerivative(REFERENCE_DATE);
// Calculator
private static final SwaptionPhysicalFixedIborHullWhiteMethod METHOD_HW =
SwaptionPhysicalFixedIborHullWhiteMethod.getInstance();
private static final SwapFixedCouponDiscountingMethod METHOD_SWAP =
SwapFixedCouponDiscountingMethod.getInstance();
private static final CashFlowEquivalentCalculator CFEC =
CashFlowEquivalentCalculator.getInstance();
private static final ParRateDiscountingCalculator PRDC =
ParRateDiscountingCalculator.getInstance();
private static final PresentValueDiscountingCalculator PVDC =
PresentValueDiscountingCalculator.getInstance();
private static final PresentValueCurveSensitivityDiscountingCalculator PVCSDC =
PresentValueCurveSensitivityDiscountingCalculator.getInstance();
private static final PresentValueHullWhiteCalculator PVHWC =
PresentValueHullWhiteCalculator.getInstance();
private static final PresentValueCurveSensitivityHullWhiteCalculator PVCSHWC =
PresentValueCurveSensitivityHullWhiteCalculator.getInstance();
private static final double SHIFT = 1.0E-6;
private static final ParameterSensitivityParameterCalculator<HullWhiteOneFactorProviderInterface>
PS_HW_C = new ParameterSensitivityParameterCalculator<>(PVCSHWC);
private static final ParameterSensitivityHullWhiteDiscountInterpolatedFDCalculator PS_HW_FDC =
new ParameterSensitivityHullWhiteDiscountInterpolatedFDCalculator(PVHWC, SHIFT);
private static final SwaptionPhysicalFixedIborHullWhiteNumericalIntegrationMethod
METHOD_HW_INTEGRATION =
SwaptionPhysicalFixedIborHullWhiteNumericalIntegrationMethod.getInstance();
private static final SwaptionPhysicalFixedIborHullWhiteApproximationMethod
METHOD_HW_APPROXIMATION = SwaptionPhysicalFixedIborHullWhiteApproximationMethod.getInstance();
private static final int NB_PATH = 12500;
private static final HullWhiteMonteCarloMethod METHOD_HW_MONTECARLO =
new HullWhiteMonteCarloMethod(new NormalRandomNumberGenerator(0.0, 1.0), NB_PATH);
private static final HullWhiteOneFactorPiecewiseConstantInterestRateModel MODEL =
new HullWhiteOneFactorPiecewiseConstantInterestRateModel();
private static final ProbabilityDistribution<Double> NORMAL = new NormalDistribution(0, 1);
private static final double TOLERANCE_PV = 1.0E-2;
private static final double TOLERANCE_PV_DELTA =
1.0E+0; // Testing note: Sensitivity is for a movement of 1. 1E+2 = 1 cent for a 1 bp move.
@Test
/** Test the present value. */
public void presentValueExplicit() {
final MultipleCurrencyAmount pv = METHOD_HW.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
final double timeToExpiry = SWAPTION_LONG_PAYER.getTimeToExpiry();
final AnnuityPaymentFixed cfe =
CFEC.visitSwap(SWAPTION_LONG_PAYER.getUnderlyingSwap(), MULTICURVES);
final int numberOfPayments = cfe.getNumberOfPayments();
final double alpha[] = new double[numberOfPayments];
final double disccf[] = new double[numberOfPayments];
for (int loopcf = 0; loopcf < numberOfPayments; loopcf++) {
alpha[loopcf] =
MODEL.alpha(
HW_PARAMETERS,
0.0,
timeToExpiry,
timeToExpiry,
cfe.getNthPayment(loopcf).getPaymentTime());
disccf[loopcf] =
MULTICURVES.getDiscountFactor(EUR, cfe.getNthPayment(loopcf).getPaymentTime())
* cfe.getNthPayment(loopcf).getAmount();
}
final double kappa = MODEL.kappa(disccf, alpha);
double pvExpected = 0.0;
for (int loopcf = 0; loopcf < numberOfPayments; loopcf++) {
pvExpected += disccf[loopcf] * NORMAL.getCDF(-kappa - alpha[loopcf]);
}
assertEquals(
"Swaption physical - Hull-White - present value", pvExpected, pv.getAmount(EUR), 1E-2);
final MultipleCurrencyAmount pv2 =
METHOD_HW.presentValue(SWAPTION_LONG_PAYER, cfe, HW_MULTICURVES);
assertEquals("Swaption physical - Hull-White - present value", pv, pv2);
}
@Test
/** Tests long/short parity. */
public void longShortParityExplicit() {
final MultipleCurrencyAmount pvLong =
METHOD_HW.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
final MultipleCurrencyAmount pvShort =
METHOD_HW.presentValue(SWAPTION_SHORT_PAYER, HW_MULTICURVES);
assertEquals(
"Swaption physical - Hull-White - present value - long/short parity",
pvLong.getAmount(EUR),
-pvShort.getAmount(EUR),
TOLERANCE_PV);
}
@Test
/** Tests payer/receiver/swap parity. */
public void payerReceiverParityExplicit() {
final MultipleCurrencyAmount pvReceiverLong =
METHOD_HW.presentValue(SWAPTION_LONG_RECEIVER, HW_MULTICURVES);
final MultipleCurrencyAmount pvPayerShort =
METHOD_HW.presentValue(SWAPTION_SHORT_PAYER, HW_MULTICURVES);
final MultipleCurrencyAmount pvSwap = SWAP_RECEIVER.accept(PVDC, MULTICURVES);
assertEquals(
"Swaption physical - Hull-White - present value - payer/receiver/swap parity",
pvReceiverLong.getAmount(EUR) + pvPayerShort.getAmount(EUR),
pvSwap.getAmount(EUR),
TOLERANCE_PV);
}
@Test
/** Tests the method against the present value calculator. */
public void presentValueMethodVsCalculator() {
final MultipleCurrencyAmount pvMethod =
METHOD_HW.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
final MultipleCurrencyAmount pvCalculator = SWAPTION_LONG_PAYER.accept(PVHWC, HW_MULTICURVES);
assertEquals(
"SwaptionPhysicalFixedIborSABRMethod: present value : method and calculator",
pvMethod,
pvCalculator);
}
@Test
/** Compare explicit formula with numerical integration. */
public void presentValueNumericalIntegration() {
final MultipleCurrencyAmount pvPayerLongExplicit =
METHOD_HW.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
final MultipleCurrencyAmount pvPayerLongIntegration =
METHOD_HW_INTEGRATION.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
assertEquals(
"Swaption physical - Hull-White - present value - explicit/numerical integration",
pvPayerLongExplicit.getAmount(EUR),
pvPayerLongIntegration.getAmount(EUR),
TOLERANCE_PV);
final MultipleCurrencyAmount pvPayerShortExplicit =
METHOD_HW.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
final MultipleCurrencyAmount pvPayerShortIntegration =
METHOD_HW_INTEGRATION.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
assertEquals(
"Swaption physical - Hull-White - present value - explicit/numerical integration",
pvPayerShortExplicit.getAmount(EUR),
pvPayerShortIntegration.getAmount(EUR),
TOLERANCE_PV);
final MultipleCurrencyAmount pvReceiverLongExplicit =
METHOD_HW.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
final MultipleCurrencyAmount pvReceiverLongIntegration =
METHOD_HW_INTEGRATION.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
assertEquals(
"Swaption physical - Hull-White - present value - explicit/numerical integration",
pvReceiverLongExplicit.getAmount(EUR),
pvReceiverLongIntegration.getAmount(EUR),
TOLERANCE_PV);
final MultipleCurrencyAmount pvReceiverShortExplicit =
METHOD_HW.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
final MultipleCurrencyAmount pvReceiverShortIntegration =
METHOD_HW_INTEGRATION.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
assertEquals(
"Swaption physical - Hull-White - present value - explicit/numerical integration",
pvReceiverShortExplicit.getAmount(EUR),
pvReceiverShortIntegration.getAmount(EUR),
TOLERANCE_PV);
}
@Test
/** Compare explicit formula with approximated formula. */
public void presentValueApproximation() {
final BlackImpliedVolatilityFormula implied = new BlackImpliedVolatilityFormula();
final double forward =
SWAPTION_LONG_PAYER
.getUnderlyingSwap()
.accept(ParRateDiscountingCalculator.getInstance(), MULTICURVES);
final double pvbp =
METHOD_SWAP.presentValueBasisPoint(SWAPTION_LONG_PAYER.getUnderlyingSwap(), MULTICURVES);
final MultipleCurrencyAmount pvPayerLongExplicit =
METHOD_HW.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
final MultipleCurrencyAmount pvPayerLongApproximation =
METHOD_HW_APPROXIMATION.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
final BlackFunctionData data = new BlackFunctionData(forward, pvbp, 0.20);
final double volExplicit =
implied.getImpliedVolatility(data, SWAPTION_LONG_PAYER, pvPayerLongExplicit.getAmount(EUR));
final double volApprox =
implied.getImpliedVolatility(
data, SWAPTION_LONG_PAYER, pvPayerLongApproximation.getAmount(EUR));
assertEquals(
"Swaption physical - Hull-White - present value - explicit/approximation",
pvPayerLongExplicit.getAmount(EUR),
pvPayerLongApproximation.getAmount(EUR),
5.0E+2);
assertEquals(
"Swaption physical - Hull-White - present value - explicit/approximation",
volExplicit,
volApprox,
2.5E-4); // 0.025%
final MultipleCurrencyAmount pvReceiverLongExplicit =
METHOD_HW.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
final MultipleCurrencyAmount pvReceiverLongApproximation =
METHOD_HW_APPROXIMATION.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
assertEquals(
"Swaption physical - Hull-White - present value - explicit/numerical integration",
pvReceiverLongExplicit.getAmount(EUR),
pvReceiverLongApproximation.getAmount(EUR),
5.0E+2);
}
@Test
/** Approximation analysis. */
public void presentValueApproximationAnalysis() {
final NormalImpliedVolatilityFormula implied = new NormalImpliedVolatilityFormula();
final int nbStrike = 20;
final double[] pvExplicit = new double[nbStrike + 1];
final double[] pvApproximation = new double[nbStrike + 1];
final double[] strike = new double[nbStrike + 1];
final double[] volExplicit = new double[nbStrike + 1];
final double[] volApprox = new double[nbStrike + 1];
final double strikeRange = 0.010;
final SwapFixedCoupon<Coupon> swap = SWAP_PAYER_DEFINITION.toDerivative(REFERENCE_DATE);
final double forward = swap.accept(PRDC, MULTICURVES);
final double pvbp = METHOD_SWAP.presentValueBasisPoint(swap, MULTICURVES);
for (int loopstrike = 0; loopstrike <= nbStrike; loopstrike++) {
strike[loopstrike] =
forward
- strikeRange
+ 3
* strikeRange
* loopstrike
/ nbStrike; // From forward-strikeRange to forward+2*strikeRange
final SwapFixedIborDefinition swapDefinition =
SwapFixedIborDefinition.from(
SETTLEMENT_DATE,
SWAP_TENOR,
EUR1YEURIBOR6M,
NOTIONAL,
strike[loopstrike],
FIXED_IS_PAYER);
final SwaptionPhysicalFixedIborDefinition swaptionDefinition =
SwaptionPhysicalFixedIborDefinition.from(EXPIRY_DATE, swapDefinition, IS_LONG);
final SwaptionPhysicalFixedIbor swaption = swaptionDefinition.toDerivative(REFERENCE_DATE);
pvExplicit[loopstrike] = METHOD_HW.presentValue(swaption, HW_MULTICURVES).getAmount(EUR);
pvApproximation[loopstrike] =
METHOD_HW_APPROXIMATION.presentValue(swaption, HW_MULTICURVES).getAmount(EUR);
final NormalFunctionData data = new NormalFunctionData(forward, pvbp, 0.01);
volExplicit[loopstrike] =
implied.getImpliedVolatility(data, swaption, pvExplicit[loopstrike]);
volApprox[loopstrike] =
implied.getImpliedVolatility(data, swaption, pvApproximation[loopstrike]);
assertEquals(
"Swaption physical - Hull-White - implied volatility - explicit/approximation",
volExplicit[loopstrike],
volApprox[loopstrike],
1.0E-3); // 0.10%
}
}
@Test(enabled = true)
/** Compare explicit formula with Monte-Carlo and long/short and payer/receiver parities. */
public void presentValueMonteCarlo() {
HullWhiteMonteCarloMethod methodMC;
methodMC =
new HullWhiteMonteCarloMethod(
new NormalRandomNumberGenerator(0.0, 1.0, new MersenneTwister()), NB_PATH);
// Seed fixed to the DEFAULT_SEED for testing purposes.
final MultipleCurrencyAmount pvPayerLongExplicit =
METHOD_HW.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
final MultipleCurrencyAmount pvPayerLongMC =
methodMC.presentValue(SWAPTION_LONG_PAYER, EUR, HW_MULTICURVES);
assertEquals(
"Swaption physical - Hull-White - Monte Carlo",
pvPayerLongExplicit.getAmount(EUR),
pvPayerLongMC.getAmount(EUR),
1.0E+4);
final double pvMCPreviousRun = 4221400.891;
assertEquals(
"Swaption physical - Hull-White - Monte Carlo",
pvMCPreviousRun,
pvPayerLongMC.getAmount(EUR),
TOLERANCE_PV);
methodMC =
new HullWhiteMonteCarloMethod(
new NormalRandomNumberGenerator(0.0, 1.0, new MersenneTwister()), NB_PATH);
final MultipleCurrencyAmount pvPayerShortMC =
methodMC.presentValue(SWAPTION_SHORT_PAYER, EUR, HW_MULTICURVES);
assertEquals(
"Swaption physical - Hull-White - Monte Carlo",
-pvPayerLongMC.getAmount(EUR),
pvPayerShortMC.getAmount(EUR),
TOLERANCE_PV);
final MultipleCurrencyAmount pvReceiverLongMC =
methodMC.presentValue(SWAPTION_LONG_RECEIVER, EUR, HW_MULTICURVES);
final MultipleCurrencyAmount pvSwap = SWAP_RECEIVER.accept(PVDC, MULTICURVES);
assertEquals(
"Swaption physical - Hull-White - Monte Carlo - payer/receiver/swap parity",
pvReceiverLongMC.getAmount(EUR) + pvPayerShortMC.getAmount(EUR),
pvSwap.getAmount(EUR),
1.0E+5);
}
@Test
/** Tests the Hull-White parameters sensitivity for the explicit formula. */
public void presentValueHullWhiteSensitivityExplicit() {
final double[] hwSensitivity =
METHOD_HW.presentValueHullWhiteSensitivity(SWAPTION_LONG_PAYER, HW_MULTICURVES);
final int nbVolatility = HW_PARAMETERS.getVolatility().length;
final double shiftVol = 1.0E-6;
final double[] volatilityBumped = new double[nbVolatility];
System.arraycopy(HW_PARAMETERS.getVolatility(), 0, volatilityBumped, 0, nbVolatility);
final double[] volatilityTime = new double[nbVolatility - 1];
System.arraycopy(HW_PARAMETERS.getVolatilityTime(), 1, volatilityTime, 0, nbVolatility - 1);
final double[] pvBumpedPlus = new double[nbVolatility];
final double[] pvBumpedMinus = new double[nbVolatility];
final HullWhiteOneFactorPiecewiseConstantParameters parametersBumped =
new HullWhiteOneFactorPiecewiseConstantParameters(
HW_PARAMETERS.getMeanReversion(), volatilityBumped, volatilityTime);
final HullWhiteOneFactorProviderDiscount bundleBumped =
new HullWhiteOneFactorProviderDiscount(MULTICURVES, parametersBumped, EUR);
for (int loopvol = 0; loopvol < nbVolatility; loopvol++) {
volatilityBumped[loopvol] += shiftVol;
parametersBumped.setVolatility(volatilityBumped);
pvBumpedPlus[loopvol] =
METHOD_HW.presentValue(SWAPTION_LONG_PAYER, bundleBumped).getAmount(EUR);
volatilityBumped[loopvol] -= 2 * shiftVol;
parametersBumped.setVolatility(volatilityBumped);
pvBumpedMinus[loopvol] =
METHOD_HW.presentValue(SWAPTION_LONG_PAYER, bundleBumped).getAmount(EUR);
assertEquals(
"Swaption - Hull-White sensitivity adjoint: derivative "
+ loopvol
+ " - difference:"
+ ((pvBumpedPlus[loopvol] - pvBumpedMinus[loopvol]) / (2 * shiftVol)
- hwSensitivity[loopvol]),
(pvBumpedPlus[loopvol] - pvBumpedMinus[loopvol]) / (2 * shiftVol),
hwSensitivity[loopvol],
TOLERANCE_PV_DELTA);
volatilityBumped[loopvol] = HW_PARAMETERS.getVolatility()[loopvol];
}
}
@Test
/** Tests long/short parity. */
public void presentValueHullWhiteSensitivitylongShortParityExplicit() {
final double[] pvhwsLong =
METHOD_HW.presentValueHullWhiteSensitivity(SWAPTION_LONG_PAYER, HW_MULTICURVES);
final double[] pvhwsShort =
METHOD_HW.presentValueHullWhiteSensitivity(SWAPTION_SHORT_PAYER, HW_MULTICURVES);
for (int loophw = 0; loophw < pvhwsLong.length; loophw++) {
assertEquals(
"Swaption physical - Hull-White - presentValueHullWhiteSensitivity - long/short parity",
pvhwsLong[loophw],
-pvhwsShort[loophw],
TOLERANCE_PV_DELTA);
}
}
@Test
/** Tests payer/receiver/swap parity. */
public void presentValueHullWhiteSensitivitypayerReceiverParityExplicit() {
final double[] pvhwsReceiverLong =
METHOD_HW.presentValueHullWhiteSensitivity(SWAPTION_LONG_RECEIVER, HW_MULTICURVES);
final double[] pvhwsPayerShort =
METHOD_HW.presentValueHullWhiteSensitivity(SWAPTION_SHORT_PAYER, HW_MULTICURVES);
for (int loophw = 0; loophw < pvhwsReceiverLong.length; loophw++) {
assertEquals(
"Swaption physical - Hull-White - present value - payer/receiver/swap parity",
0,
pvhwsReceiverLong[loophw] + pvhwsPayerShort[loophw],
TOLERANCE_PV_DELTA);
}
}
@Test
/** Tests present value curve sensitivity when the valuation date is on trade date. */
public void presentValueCurveSensitivity() {
final MultipleCurrencyParameterSensitivity pvpsExact =
PS_HW_C.calculateSensitivity(
SWAPTION_SHORT_RECEIVER,
HW_MULTICURVES,
HW_MULTICURVES.getMulticurveProvider().getAllNames());
final MultipleCurrencyParameterSensitivity pvpsFD =
PS_HW_FDC.calculateSensitivity(SWAPTION_SHORT_RECEIVER, HW_MULTICURVES);
AssertSensivityObjects.assertEquals(
"SwaptionPhysicalFixedIborSABRMethod: presentValueCurveSensitivity ",
pvpsExact,
pvpsFD,
TOLERANCE_PV_DELTA);
}
@Test(enabled = false)
/** Tests present value curve sensitivity when the valuation date is on trade date. */
public void presentValueCurveSensitivityStability() {
// 5Yx5Y
final MultipleCurrencyParameterSensitivity pvpsExact =
PS_HW_C.calculateSensitivity(
SWAPTION_SHORT_RECEIVER,
HW_MULTICURVES,
HW_MULTICURVES.getMulticurveProvider().getAllNames());
final double derivativeExact = pvpsExact.totalSensitivity(MULTICURVES.getFxRates(), EUR);
final double startingShift = 1.0E-4;
final double ratio = Math.sqrt(2.0);
final int nbShift = 55;
final double[] eps = new double[nbShift + 1];
final double[] derivative_FD = new double[nbShift];
final double[] diff = new double[nbShift];
eps[0] = startingShift;
for (int loopshift = 0; loopshift < nbShift; loopshift++) {
final ParameterSensitivityHullWhiteDiscountInterpolatedFDCalculator fdShift =
new ParameterSensitivityHullWhiteDiscountInterpolatedFDCalculator(PVHWC, eps[loopshift]);
final MultipleCurrencyParameterSensitivity pvpsFD =
fdShift.calculateSensitivity(SWAPTION_SHORT_RECEIVER, HW_MULTICURVES);
derivative_FD[loopshift] = pvpsFD.totalSensitivity(MULTICURVES.getFxRates(), EUR);
diff[loopshift] = derivative_FD[loopshift] - derivativeExact;
eps[loopshift + 1] = eps[loopshift] / ratio;
}
// 1Mx5Y
final Period expirationPeriod =
Period.ofDays(
1); // Period.ofDays(1); Period.ofDays(7); Period.ofMonths(1); Period.ofYears(1);
// Period.ofYears(10);
final ZonedDateTime expiryDateExp =
ScheduleCalculator.getAdjustedDate(REFERENCE_DATE, expirationPeriod, EURIBOR6M, CALENDAR);
final ZonedDateTime settlementDateExp =
ScheduleCalculator.getAdjustedDate(expiryDateExp, SPOT_LAG, CALENDAR);
final double ATM = 0.0151; // 1W: 1.52% - 1M: 1.52% - 1Y: 1.51% - 10Y: 1.51%
final SwapFixedIborDefinition swapExpx5YDefinition =
SwapFixedIborDefinition.from(
settlementDateExp, SWAP_TENOR, EUR1YEURIBOR6M, NOTIONAL, ATM, !FIXED_IS_PAYER);
final SwaptionPhysicalFixedIborDefinition swaptionExpx5YDefinition =
SwaptionPhysicalFixedIborDefinition.from(EXPIRY_DATE, swapExpx5YDefinition, !IS_LONG);
final SwaptionPhysicalFixedIbor swaptionExpx5Y =
swaptionExpx5YDefinition.toDerivative(REFERENCE_DATE);
// final double forward = swaptionExpx5Y.getUnderlyingSwap().accept(PRDC, MULTICURVES);
final MultipleCurrencyParameterSensitivity pvpsExactExp =
PS_HW_C.calculateSensitivity(
swaptionExpx5Y, HW_MULTICURVES, HW_MULTICURVES.getMulticurveProvider().getAllNames());
final double derivativeExactExp = pvpsExactExp.totalSensitivity(MULTICURVES.getFxRates(), EUR);
final double[] derivative_FDExp = new double[nbShift];
final double[] diffExp = new double[nbShift];
for (int loopshift = 0; loopshift < nbShift; loopshift++) {
final ParameterSensitivityHullWhiteDiscountInterpolatedFDCalculator fdShift =
new ParameterSensitivityHullWhiteDiscountInterpolatedFDCalculator(PVHWC, eps[loopshift]);
final MultipleCurrencyParameterSensitivity pvpsFD =
fdShift.calculateSensitivity(swaptionExpx5Y, HW_MULTICURVES);
derivative_FDExp[loopshift] = pvpsFD.totalSensitivity(MULTICURVES.getFxRates(), EUR);
diffExp[loopshift] = derivative_FDExp[loopshift] - derivativeExactExp;
}
// int t = 0;
// t++;
}
@Test
/** Tests long/short parity. */
public void presentValueCurveSensitivityLongShortParityExplicit() {
final MultipleCurrencyMulticurveSensitivity pvhwsLong =
METHOD_HW.presentValueCurveSensitivity(SWAPTION_LONG_PAYER, HW_MULTICURVES);
final MultipleCurrencyMulticurveSensitivity pvhwsShort =
METHOD_HW.presentValueCurveSensitivity(SWAPTION_SHORT_PAYER, HW_MULTICURVES);
AssertSensivityObjects.assertEquals(
"Swaption physical - Hull-White - presentValueCurveSensitivity - long/short parity",
pvhwsLong,
pvhwsShort.multipliedBy(-1.0),
TOLERANCE_PV_DELTA);
}
@Test
/** Tests payer/receiver/swap parity. */
public void presentValueCurveSensitivityPayerReceiverParityExplicit() {
final MultipleCurrencyMulticurveSensitivity pvhwsReceiverLong =
METHOD_HW.presentValueCurveSensitivity(SWAPTION_LONG_RECEIVER, HW_MULTICURVES);
final MultipleCurrencyMulticurveSensitivity pvhwsPayerShort =
METHOD_HW.presentValueCurveSensitivity(SWAPTION_SHORT_PAYER, HW_MULTICURVES);
final MultipleCurrencyMulticurveSensitivity pvSwap = SWAP_RECEIVER.accept(PVCSDC, MULTICURVES);
AssertSensivityObjects.assertEquals(
"Swaption physical - Hull-White - presentValueCurveSensitivity - payer/receiver/swap parity",
pvSwap.cleaned(TOLERANCE_PV_DELTA),
pvhwsReceiverLong.plus(pvhwsPayerShort).cleaned(TOLERANCE_PV_DELTA),
TOLERANCE_PV_DELTA);
}
@Test
/** Tests the curve sensitivity in Monte Carlo approach. */
public void presentValueCurveSensitivityMonteCarlo() {
final double toleranceDelta = 1.0E+6; // 100 USD by bp
final MultipleCurrencyMulticurveSensitivity pvcsExplicit =
METHOD_HW
.presentValueCurveSensitivity(SWAPTION_LONG_PAYER, HW_MULTICURVES)
.cleaned(TOLERANCE_PV_DELTA);
final HullWhiteMonteCarloMethod methodMC =
new HullWhiteMonteCarloMethod(
new NormalRandomNumberGenerator(0.0, 1.0, new MersenneTwister()), NB_PATH);
final MultipleCurrencyMulticurveSensitivity pvcsMC =
methodMC
.presentValueCurveSensitivity(SWAPTION_LONG_PAYER, EUR, HW_MULTICURVES)
.cleaned(TOLERANCE_PV_DELTA);
AssertSensivityObjects.assertEquals(
"Swaption physical - Hull-White - presentValueCurveSensitivity - payer/receiver/swap parity",
pvcsExplicit,
pvcsMC,
toleranceDelta);
}
@Test(enabled = false)
/** Tests of performance. "enabled = false" for the standard testing. */
public void performance() {
long startTime, endTime;
final int nbTest = 1000;
MultipleCurrencyAmount pvPayerLongExplicit = MultipleCurrencyAmount.of(EUR, 0.0);
MultipleCurrencyAmount pvPayerLongIntegration = MultipleCurrencyAmount.of(EUR, 0.0);
MultipleCurrencyAmount pvPayerLongApproximation = MultipleCurrencyAmount.of(EUR, 0.0);
@SuppressWarnings("unused")
MultipleCurrencyAmount pvPayerLongMC = MultipleCurrencyAmount.of(EUR, 0.0);
double[] pvhws =
METHOD_HW.presentValueHullWhiteSensitivity(SWAPTION_LONG_PAYER, HW_MULTICURVES);
MultipleCurrencyMulticurveSensitivity pvcs =
METHOD_HW.presentValueCurveSensitivity(SWAPTION_LONG_PAYER, HW_MULTICURVES);
startTime = System.currentTimeMillis();
for (int looptest = 0; looptest < nbTest; looptest++) {
pvPayerLongExplicit = METHOD_HW.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
}
endTime = System.currentTimeMillis();
System.out.println(
nbTest + " pv swaption Hull-White explicit method: " + (endTime - startTime) + " ms");
// Performance note: HW price: 19-Nov-2012: On Mac Pro 3.2 GHz Quad-Core Intel Xeon: 380 ms for
// 10000 swaptions.
startTime = System.currentTimeMillis();
for (int looptest = 0; looptest < nbTest; looptest++) {
pvhws = METHOD_HW.presentValueHullWhiteSensitivity(SWAPTION_LONG_PAYER, HW_MULTICURVES);
}
endTime = System.currentTimeMillis();
System.out.println(
nbTest
+ " HW sensitivity swaption Hull-White explicit method: "
+ (endTime - startTime)
+ " ms");
// Performance note: HW sensitivity (3): 19-Nov-2012: On Mac Pro 3.2 GHz Quad-Core Intel Xeon:
// 430 ms for 10000 swaptions.
startTime = System.currentTimeMillis();
for (int looptest = 0; looptest < nbTest; looptest++) {
pvcs = METHOD_HW.presentValueCurveSensitivity(SWAPTION_LONG_PAYER, HW_MULTICURVES);
}
endTime = System.currentTimeMillis();
System.out.println(
nbTest
+ " curve sensitivity swaption Hull-White explicit method: "
+ (endTime - startTime)
+ " ms");
// Performance note: curve sensitivity (40): 19-Nov-2012: On Mac Pro 3.2 GHz Quad-Core Intel
// Xeon: 855 ms for 10000 swaptions.
startTime = System.currentTimeMillis();
for (int looptest = 0; looptest < nbTest; looptest++) {
pvhws = METHOD_HW.presentValueHullWhiteSensitivity(SWAPTION_LONG_PAYER, HW_MULTICURVES);
pvcs = METHOD_HW.presentValueCurveSensitivity(SWAPTION_LONG_PAYER, HW_MULTICURVES);
pvhws = METHOD_HW.presentValueHullWhiteSensitivity(SWAPTION_LONG_PAYER, HW_MULTICURVES);
}
endTime = System.currentTimeMillis();
System.out.println(
nbTest
+ " price/delta/vega swaption Hull-White explicit method: "
+ (endTime - startTime)
+ " ms");
// Performance note: present value/delta/vega: 19-Nov-2012: On Mac Pro 3.2 GHz Quad-Core Intel
// Xeon: 1730 ms for 10000 swaptions.
startTime = System.currentTimeMillis();
for (int looptest = 0; looptest < nbTest; looptest++) {
pvPayerLongIntegration =
METHOD_HW_INTEGRATION.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
}
endTime = System.currentTimeMillis();
System.out.println(
nbTest
+ " swaption Hull-White numerical integration method: "
+ (endTime - startTime)
+ " ms");
// Performance note: HW numerical integration: 19-Nov-2012: On Mac Pro 3.2 GHz Quad-Core Intel
// Xeon: 1700 ms for 10000 swaptions.
startTime = System.currentTimeMillis();
for (int looptest = 0; looptest < nbTest; looptest++) {
pvPayerLongApproximation =
METHOD_HW_APPROXIMATION.presentValue(SWAPTION_LONG_PAYER, HW_MULTICURVES);
}
endTime = System.currentTimeMillis();
System.out.println(
nbTest + " swaption Hull-White approximation method: " + (endTime - startTime) + " ms");
// Performance note: HW approximation: 19-Nov-2012: On Mac Pro 3.2 GHz Quad-Core Intel Xeon: 250
// ms for 10000 swaptions.
startTime = System.currentTimeMillis();
for (int looptest = 0; looptest < nbTest; looptest++) {
pvPayerLongMC = METHOD_HW_MONTECARLO.presentValue(SWAPTION_LONG_PAYER, EUR, HW_MULTICURVES);
}
endTime = System.currentTimeMillis();
System.out.println(
nbTest
+ " swaption Hull-White Monte Carlo method ("
+ NB_PATH
+ " paths): "
+ (endTime - startTime)
+ " ms");
// Performance note: HW approximation: 18-Aug-11: On Mac Pro 3.2 GHz Quad-Core Intel Xeon: 9200
// ms for 1000 swaptions (12500 paths).
final double difference =
pvPayerLongExplicit.getAmount(EUR) - pvPayerLongIntegration.getAmount(EUR);
final double difference2 =
pvPayerLongExplicit.getAmount(EUR) - pvPayerLongApproximation.getAmount(EUR);
// double difference3 = pvPayerLongExplicit.getAmount(CUR) - pvPayerLongMC.getAmount(CUR);
System.out.println("Difference explicit-integration: " + difference);
System.out.println("Difference explicit-approximation: " + difference2);
// System.out.println("Difference explicit-Monte Carlo: " + difference3);
System.out.println("Curve sensitivity: " + pvcs.toString());
System.out.println("HW sensitivity: " + Arrays.toString(pvhws));
}
@Test(enabled = false)
/** Tests of performance. "enabled = false" for the standard testing. */
public void performanceCurveSensitivity() {
long startTime, endTime;
final int nbTest = 25;
MultipleCurrencyAmount pvMC = MultipleCurrencyAmount.of(EUR, 0.0);
final MultipleCurrencyMulticurveSensitivity pvcsExplicit =
METHOD_HW.presentValueCurveSensitivity(SWAPTION_LONG_PAYER, HW_MULTICURVES);
MultipleCurrencyMulticurveSensitivity pvcsMC = pvcsExplicit;
final HullWhiteMonteCarloMethod methodMC =
new HullWhiteMonteCarloMethod(
new NormalRandomNumberGenerator(0.0, 1.0, new MersenneTwister()), NB_PATH);
startTime = System.currentTimeMillis();
for (int looptest = 0; looptest < nbTest; looptest++) {
pvMC = METHOD_HW_MONTECARLO.presentValue(SWAPTION_LONG_PAYER, EUR, HW_MULTICURVES);
}
endTime = System.currentTimeMillis();
System.out.println(
nbTest
+ " swaption Hull-White Monte Carlo method ("
+ NB_PATH
+ " paths): "
+ (endTime - startTime)
+ " ms / price:"
+ pvMC.toString());
// Performance note: HW approximation: 03-Dec-2012: On Mac Pro 3.2 GHz Quad-Core Intel Xeon: 250
// ms for 25 swaptions (12500 paths).
startTime = System.currentTimeMillis();
for (int looptest = 0; looptest < nbTest; looptest++) {
pvcsMC = methodMC.presentValueCurveSensitivity(SWAPTION_LONG_PAYER, EUR, HW_MULTICURVES);
}
endTime = System.currentTimeMillis();
System.out.println(
nbTest
+ " curve sensitivity swaption Hull-White MC method: ("
+ NB_PATH
+ " paths) "
+ (endTime - startTime)
+ " ms / risk:"
+ pvcsMC.toString());
// Performance note: curve sensitivity (40): 03-Dec-2012: On Mac Pro 3.2 GHz Quad-Core Intel
// Xeon: 600 ms for 25 swaptions (12500 paths).
}
}
/**
* Calculator of decision schedule for different instruments. Used in particular for Monte Carlo
* pricing.
*/
public class DecisionScheduleCalculator
extends InstrumentDerivativeVisitorAdapter<MulticurveProviderInterface, DecisionSchedule> {
/** The unique instance of the calculator. */
private static final DecisionScheduleCalculator INSTANCE = new DecisionScheduleCalculator();
/** Constructor. */
DecisionScheduleCalculator() {}
/**
* Gets the calculator instance.
*
* @return The calculator.
*/
public static DecisionScheduleCalculator getInstance() {
return INSTANCE;
}
/** The cash-flow equivalent calculator. */
private static final CashFlowEquivalentCalculator CFEC =
CashFlowEquivalentCalculator.getInstance();
@Override
public DecisionSchedule visitSwaptionPhysicalFixedIbor(
final SwaptionPhysicalFixedIbor swaption, final MulticurveProviderInterface multicurves) {
final double[] decisionTime = new double[] {swaption.getTimeToExpiry()};
final AnnuityPaymentFixed cfe = swaption.getUnderlyingSwap().accept(CFEC, multicurves);
final double[][] impactTime = new double[1][cfe.getNumberOfPayments()];
final double[][] impactAmount = new double[1][cfe.getNumberOfPayments()];
for (int loopcf = 0; loopcf < cfe.getNumberOfPayments(); loopcf++) {
impactTime[0][loopcf] = cfe.getNthPayment(loopcf).getPaymentTime();
impactAmount[0][loopcf] = cfe.getNthPayment(loopcf).getAmount();
}
final DecisionSchedule decision = new DecisionSchedule(decisionTime, impactTime, impactAmount);
return decision;
}
@Override
public DecisionSchedule visitSwaptionCashFixedIbor(
final SwaptionCashFixedIbor swaption, final MulticurveProviderInterface multicurves) {
final double[] decisionTime = new double[] {swaption.getTimeToExpiry()};
final AnnuityPaymentFixed cfeIbor =
swaption.getUnderlyingSwap().getSecondLeg().accept(CFEC, multicurves);
final int nbCfeIbor = cfeIbor.getNumberOfPayments();
final int nbCpnFixed = swaption.getUnderlyingSwap().getFixedLeg().getNumberOfPayments();
final double[][] impactTime = new double[1][nbCpnFixed + nbCfeIbor];
final double[][] impactAmount = new double[1][nbCpnFixed + nbCfeIbor];
// Fixed leg
for (int loopcf = 0; loopcf < nbCpnFixed; loopcf++) {
impactTime[0][loopcf] =
swaption.getUnderlyingSwap().getFixedLeg().getNthPayment(loopcf).getPaymentTime();
impactAmount[0][loopcf] =
swaption.getUnderlyingSwap().getFixedLeg().getNthPayment(loopcf).getPaymentYearFraction()
* swaption.getUnderlyingSwap().getFixedLeg().getNthPayment(loopcf).getNotional();
}
// Ibor leg
for (int loopcf = 0; loopcf < nbCfeIbor; loopcf++) {
impactTime[0][nbCpnFixed + loopcf] = cfeIbor.getNthPayment(loopcf).getPaymentTime();
impactAmount[0][nbCpnFixed + loopcf] = cfeIbor.getNthPayment(loopcf).getAmount();
}
final DecisionSchedule decision = new DecisionSchedule(decisionTime, impactTime, impactAmount);
return decision;
}
@Override
public DecisionSchedule visitCapFloorIbor(
final CapFloorIbor payment, final MulticurveProviderInterface multicurves) {
final double[] decisionTime = new double[] {payment.getFixingTime()};
final double fixingStartTime = payment.getFixingPeriodStartTime();
final double fixingEndTime = payment.getFixingPeriodEndTime();
final double paymentTime = payment.getPaymentTime();
final double[][] impactTime = new double[1][];
impactTime[0] = new double[] {fixingStartTime, fixingEndTime, paymentTime};
final double[][] impactAmount = new double[1][];
double forward =
multicurves.getForwardRate(
payment.getIndex(),
payment.getFixingPeriodStartTime(),
payment.getFixingPeriodEndTime(),
payment.getFixingAccrualFactor());
final double beta =
(1.0 + payment.getFixingAccrualFactor() * forward)
* multicurves.getDiscountFactor(payment.getCurrency(), payment.getFixingPeriodEndTime())
/ multicurves.getDiscountFactor(
payment.getCurrency(), payment.getFixingPeriodStartTime());
impactAmount[0] = new double[] {beta, -1.0, 1.0};
final DecisionSchedule decision = new DecisionSchedule(decisionTime, impactTime, impactAmount);
return decision;
}
@Override
public DecisionSchedule visitAnnuityCouponIborRatchet(
final AnnuityCouponIborRatchet annuity, final MulticurveProviderInterface multicurves) {
final int nbCpn = annuity.getNumberOfPayments();
final double[] decisionTime = new double[nbCpn];
final double[][] impactTime = new double[nbCpn][];
final double[][] impactAmount = new double[nbCpn][];
for (int loopcpn = 0; loopcpn < nbCpn; loopcpn++) {
final AnnuityPaymentFixed cfe = annuity.getNthPayment(loopcpn).accept(CFEC, multicurves);
decisionTime[loopcpn] =
annuity.isFixed()[loopcpn]
? 0.0
: ((CouponFloating) annuity.getNthPayment(loopcpn)).getFixingTime();
impactTime[loopcpn] = new double[cfe.getNumberOfPayments()];
impactAmount[loopcpn] = new double[cfe.getNumberOfPayments()];
for (int loopcf = 0; loopcf < cfe.getNumberOfPayments(); loopcf++) {
impactTime[loopcpn][loopcf] = cfe.getNthPayment(loopcf).getPaymentTime();
impactAmount[loopcpn][loopcf] = cfe.getNthPayment(loopcf).getAmount();
}
}
final DecisionSchedule decision = new DecisionSchedule(decisionTime, impactTime, impactAmount);
return decision;
}
}