private void promptMarketPrice(Stock stock) {
   String marketPriceStr =
       getInput("Please enter the market price for " + stock.getStockSymbol() + ": ");
   double marketPrice = 0;
   try {
     marketPrice = Double.parseDouble(marketPriceStr);
     stock.setMarketPrice(marketPrice);
   } catch (Exception e) {
     System.out.println("Invalid Market Price!");
     promptMarketPrice(stock);
   }
 }