BS options val, page-109

OK working backwards the implied share price volatility based on the closing prices of the options and mains (heads) on Friday of 29cents and 45.5cents (and assuming an annualised risk free rate of 2.25%) from the Black-Scholes model is 4.96%. That number is way below what one would expect so you would need to calculate the annualised historic volatility to get a better reading on what the options should in theory be trading at. I might give it a crack if I can find some closing price data for CDV that I can run through excel. Esh