Before revision:  I further propose a new feature for insurance type derivativeswhich is a clawback lien, here 77\%,  to be paid back to the underwriter  to prevent perverse incentive .
After revision:  I further propose a new feature for insurance type derivativeswhich is a clawback lien, closes out the equity default swap. Here it is optimized at 77\%, to be paid back to the underwriter to prevent perverse incentive .