One reason I like spreads over pure longs is expectancy. Obviously if I get a straight-line move calls or puts will beat spreads. In the real world itâs the zigs and zags that kill that kill positions. With verticals you can withstand some counter moves and still be alive. I find spreads (sometime even directional flys) allow me to maintain positive expectancy over more trades than outright long or short. No one trade will settle the dispute. Maybe a few hundred would help one to decide.
You are spot on. No one will disagree that the p&l on a one way move isn't better with the naked but it is all about probability of success over a number of trades. If I knew SPX was going to jump up 20 pts tomorrow, of course I would buy a call.
