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Buenos Aires Argentina
Experience: Advanced
Platform: NT, MT4, Sierra
Trading: S&P, Bonds, Crude, FX
Posts: 250 since Sep 2014
Thanks Given: 37
Thanks Received: 257
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Delta will tell you how much your option will gain or lose in value per 1.00 unit price change. Theoretically, price moving in your direction will always increase value of your option, it just may not be perceivable because if you have a delta of .005, then you're probably not going to have any net gains after theta decay, or more practically, your delta gain will be offset by the theta decay, in which case your unrealized P&L will still be zero or less than zero.
Gamma will tell you how much your rate of change in Delta will go up as price moves up.
So for a grossly overly simplified forecast, if when you bought the option, delta is .10, and the stock has gained three dollars, then you would expect your option to now be worth .30 more than when you bought it (less Theta x the number of days you have owned the option).
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