Payoff type of a derivative leg, which may be a stand-alone trade (e.g. fra, cap), or part of an instrument refered to in the derivative_type attibute (eg. vanilla_swap). The atribute is an enum with the following members:
the leg cash flows are fixed amounts
cashflows are floating interest amount linked to a rate index ((e.g. USD_LIBOR_BBA) populated in the underlying_index attribute; the notional amount is fixed (not indexed). Used only for the interest rate asset class.
cashflows are linked to the performance/price variation of an underlying index (e.g inflation, equity index, security price, etc.) for transactions in all asset classes
option leg in any asset class with variable amounts equal to max(underlying value - strike, 0)
option leg in any asset class with variable amounts equal to max(strike - underlying value, 0)