// -------------------------------------------------------------------------
public void test_cashFlowEquivalentAndSensitivity() {
Swap swap = Swap.builder().legs(IBOR_LEG, FIXED_LEG).build();
ImmutableMap<NotionalExchange, PointSensitivityBuilder> computedFull =
CashFlowEquivalentCalculator.cashFlowEquivalentAndSensitivitySwap(swap.expand(), PROVIDER);
ImmutableList<NotionalExchange> keyComputedFull = computedFull.keySet().asList();
ImmutableList<PointSensitivityBuilder> valueComputedFull = computedFull.values().asList();
ImmutableMap<NotionalExchange, PointSensitivityBuilder> computedIborLeg =
CashFlowEquivalentCalculator.cashFlowEquivalentAndSensitivityIborLeg(
IBOR_LEG.expand(), PROVIDER);
ImmutableMap<NotionalExchange, PointSensitivityBuilder> computedFixedLeg =
CashFlowEquivalentCalculator.cashFlowEquivalentAndSensitivityFixedLeg(
FIXED_LEG.expand(), PROVIDER);
assertEquals(computedFixedLeg.keySet().asList(), keyComputedFull.subList(0, 2));
assertEquals(computedIborLeg.keySet().asList(), keyComputedFull.subList(2, 6));
assertEquals(computedFixedLeg.values().asList(), valueComputedFull.subList(0, 2));
assertEquals(computedIborLeg.values().asList(), valueComputedFull.subList(2, 6));
double eps = 1.0e-7;
RatesFiniteDifferenceSensitivityCalculator calc =
new RatesFiniteDifferenceSensitivityCalculator(eps);
int size = keyComputedFull.size();
for (int i = 0; i < size; ++i) {
final int index = i;
CurveCurrencyParameterSensitivities expected =
calc.sensitivity(
PROVIDER,
p ->
((NotionalExchange)
CashFlowEquivalentCalculator.cashFlowEquivalentSwap(swap.expand(), p)
.getPaymentEvents()
.get(index))
.getPaymentAmount());
PointSensitivityBuilder point =
computedFull.get(
CashFlowEquivalentCalculator.cashFlowEquivalentSwap(swap.expand(), PROVIDER)
.getPaymentEvents()
.get(index));
CurveCurrencyParameterSensitivities computed =
PROVIDER.curveParameterSensitivity(point.build());
assertTrue(computed.equalWithTolerance(expected, eps * NOTIONAL));
}
}
public void test_cashFlowEquivalent() {
Swap swap = Swap.builder().legs(IBOR_LEG, FIXED_LEG).build();
ExpandedSwapLeg computed =
CashFlowEquivalentCalculator.cashFlowEquivalentSwap(swap.expand(), PROVIDER);
ExpandedSwapLeg computedIborLeg =
CashFlowEquivalentCalculator.cashFlowEquivalentIborLeg(IBOR_LEG.expand(), PROVIDER);
ExpandedSwapLeg computedFixedLeg =
CashFlowEquivalentCalculator.cashFlowEquivalentFixedLeg(FIXED_LEG.expand(), PROVIDER);
assertEquals(computedFixedLeg.getPaymentEvents(), computed.getPaymentEvents().subList(0, 2));
assertEquals(computedIborLeg.getPaymentEvents(), computed.getPaymentEvents().subList(2, 6));
// expected payments from fixed leg
NotionalExchange fixedPayment1 =
NotionalExchange.of(PAYMENT1, CurrencyAmount.of(GBP, NOTIONAL * RATE * PAY_YC1));
NotionalExchange fixedPayment2 =
NotionalExchange.of(PAYMENT2, CurrencyAmount.of(GBP, NOTIONAL * RATE * PAY_YC2));
// expected payments from ibor leg
LocalDate fixingSTART1 = GBP_LIBOR_3M.calculateEffectiveFromFixing(FIXING1);
double fixedYearFraction1 =
GBP_LIBOR_3M
.getDayCount()
.relativeYearFraction(
fixingSTART1, GBP_LIBOR_3M.calculateMaturityFromEffective(fixingSTART1));
double beta1 =
(1d + fixedYearFraction1 * PROVIDER.iborIndexRates(GBP_LIBOR_3M).rate(FIXING1))
* PROVIDER.discountFactor(GBP, PAYMENT1)
/ PROVIDER.discountFactor(GBP, fixingSTART1);
NotionalExchange iborPayment11 =
NotionalExchange.of(
fixingSTART1, CurrencyAmount.of(GBP, -NOTIONAL * beta1 * PAY_YC1 / fixedYearFraction1));
NotionalExchange iborPayment12 =
NotionalExchange.of(
PAYMENT1, CurrencyAmount.of(GBP, NOTIONAL * PAY_YC1 / fixedYearFraction1));
LocalDate fixingSTART2 = GBP_LIBOR_3M.calculateEffectiveFromFixing(FIXING2);
double fixedYearFraction2 =
GBP_LIBOR_3M
.getDayCount()
.relativeYearFraction(
fixingSTART2, GBP_LIBOR_3M.calculateMaturityFromEffective(fixingSTART2));
double beta2 =
(1d + fixedYearFraction2 * PROVIDER.iborIndexRates(GBP_LIBOR_3M).rate(FIXING2))
* PROVIDER.discountFactor(GBP, PAYMENT2)
/ PROVIDER.discountFactor(GBP, fixingSTART2);
NotionalExchange iborPayment21 =
NotionalExchange.of(
fixingSTART2, CurrencyAmount.of(GBP, -NOTIONAL * beta2 * PAY_YC2 / fixedYearFraction2));
NotionalExchange iborPayment22 =
NotionalExchange.of(
PAYMENT2, CurrencyAmount.of(GBP, NOTIONAL * PAY_YC2 / fixedYearFraction2));
ExpandedSwapLeg expected =
ExpandedSwapLeg.builder()
.type(OTHER)
.payReceive(RECEIVE)
.paymentEvents(
fixedPayment1,
fixedPayment2,
iborPayment11,
iborPayment12,
iborPayment21,
iborPayment22)
.build();
double eps = 1.0e-12;
assertEquals(computed.getPaymentEvents().size(), expected.getPaymentEvents().size());
for (int i = 0; i < 6; ++i) {
NotionalExchange payCmp = (NotionalExchange) computed.getPaymentEvents().get(i);
NotionalExchange payExp = (NotionalExchange) expected.getPaymentEvents().get(i);
assertEquals(payCmp.getCurrency(), payExp.getCurrency());
assertEquals(payCmp.getPaymentDate(), payExp.getPaymentDate());
assertTrue(
DoubleMath.fuzzyEquals(
payCmp.getPaymentAmount().getAmount(),
payExp.getPaymentAmount().getAmount(),
NOTIONAL * eps));
}
}