## Comment on Theta

Here is the general framework Rohan – For a call option with increase in spot price/time/volatility, the delta increases hence adds to premium, time value decreases hence drags down the premium, and with increase in vega the premium increases.

For a put option with decrease in spot price/volatility, the delta increases hence adds to premium, with increase in vega the premium increases. Time moves in only 1 direction hence it always tends to drag the premium lower.