UnderlyingDividendCapRate <42808> field
FIX 5.0 SP2 EP270
The cap rate, if any, which applies to the floating rate. It is only required where the floating rate is capped at a certain level. The cap rate is assumed to be exclusive of any spread and is a per annum rate, expressed as a decimal. A cap rate of 5% would be represented as "0.05".