The name of the game is getting back more value than you give up. When I look to make a trade, I will accept nothing less. It a basic theory that may come as no surprise to seasoned market veterans, but is worth reiterating because a lot of newcomers can be intimidated and lose sight of the basics.
If I am spending real money, I want some sort of advantage that will increase my chances of winning. By buying deep-in-the-money calls, my advantage is that I am getting exposure to the world's best companies at a fraction of the cost of the common stock.
In baseball, finding value in trades and players is a difficult and extremely important task that requires a ton of homework and judgment. Meanwhile, the Phillies and Rays are locked in a holding pattern after rain stopped Game 5 of the World Series last night in the sixth inning with the score tied 2-2.