A path-dependent interest rate option (specifically, an interest rate cap) which protects its holder against increases in total interest obligations over a particular period of time. The interest rate resets many times so as the final interest expense is determined for the whole period. In that sense, and in contrast to standard caps, the cumulative cap doesn’t provide a period-to-period protection.
The cumulative cap is alternatively known as a Q-cap or a payment cap.
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