In the binomial option valuation model, a call has a hedge ratio of 0.8, and a put has a hedge ratio of -0.09999999999999999. You want to form a riskfree portfolio using the call and the put. Assume the portfolio has one call. Then it should contain puts (keep 2 decimal places). In the binomial option valuation model, a call has a hedge ratio of 0.8, and a put has a hedge ratio of -0.09999999999999999. You want to form a riskfree portfolio using the call and the put. Assume the portfolio has one call. Then it should contain puts (keep 2 decimal places)