(1) With futures, your leverage is the reciprocal of the margin percentage, i.e. a 5% margin, (1/20), means you have "twenty times", (20/1), leverage. (2) With call-options, I compare the strike price to the option premium. With out-of-the-money call-options, the strike price (numerator) gets larger while the option premium (denominator) gets smaller. You have a progressively smaller amount of money, the premium, controlling a larger amount of contract value, the strike price.