Happy Friday eve, readers. I'm Phil Rosen. As a financial journalist, I'm always trying to distill complex ideas into plain language (for my own understanding as much as yours). 

As for Opening Bell, I've found it helpful to remember that the stock market operates as a zero-sum game.

Like poker or chess, one player's win means another player's loss. 

Sure, you don't have to work at a hedge fund to grasp the idea, but looking at the 10 biggest losers in the S&P 500 so far this year got me thinking: 

Whoever bet correctly on any of the names on this list pocketed some serious gains in the first quarter.