Field UnderlyingPaymentStreamMarketRate (40569) - FIX Protocol FIX.5.0SP2 EP240
Used only for credit index trade. This contains the credit spread ("fair value") at which the trade was executed. The market rate varies over the life of the index depending on market conditions. This is the price of the index as quoted by trading desks.
Added in protocol FIX.5.0SP2 (161)