consider a portfolio of call options A, B, C and D on the same underlying stock. The quantity of iptions and each option's price and Delta is as follows continuous risk-free rate is 4%. What is the elasticity of the portfolio if the stock price is $30 ? consider a portfolio of call options A, B, C and D on the same underlying stock. The quantity of iptions and each option's price and Delta is as follows continuous risk-free rate is 4%. What is the elasticity of the portfolio if the stock price is $30