... accordingly the corresponding market models.Again, the choice of the discount curve D depends on the credit worthiness of the counterparty and on the possible presence of a collateral mitigating the ... a floating rate bond, where rates areset at the beginning of their application period and paid at the end, is always worth parat inception, irrespectively of the length of the underlying rate ... obtained and closed form formulas for caplets and swaptions derived in the lognormal and Heston(1993) cases.1 IntroductionBefore the credit crunch of 2007, the interest rates quoted in the market...