... The at -the- money options, the 380s, have the most increase in theta because they contain the most time premium. Those nearest the money, the 360s and the 400s, also have increased theta. The ... the 95 put and buy the 90 put, creating a short put spread.Another bullish strategy is to buy the 105 call while selling the 110 call, creating a long call spread. If instead we sell the 105 ... expiration, the gammas of both the at- the- money options, and the options near -the- money, increase. The effect of time decay, however, causes the gammas of the far out-of -the- money and far in -the- money...