The CSI 300 Index is currently trading at 4,150. The continu- ously compounded risk-free rate is r = 0.06. The price of a European call option on the CSI 300 Index expiring in one year with a strike price of 4,150 is 437.50 CNY. You have decided to invest 10,000 CNY in an equity-linked CD maturing in 6 months that guarantees the return of your original investment plus a certain percentage of any upside gain in the CSI 300 Index over the year. If the market is arbitrage-free, what percentage of any upside gain in the CSI 300 Index over the year do you expect to receive? i.e. what is the participation rate?