Quote from IV_Trader:
Risk , why do you need a dramatic vols incrise to get option gains > than a 1$ with 1$ gain in spot ?
Any ATM ( delta>.5) and Vega of 0.30 will gain more than a 1$ with 200bp gains under the above conditions , no ?
200basis gain in what, implied vols? A vega of .30?! Where are you finding .30 vega on atm options other than index markets? A $50spot/50call w/60d to expiration carries a vega of .08 at 30vol. Using $50spot and 50strike calls with 60d to expiration at 30% vol, I get a $prem increase of $.66 at a flat dvega/dvol and no discrete gamma calc.
