Today US equity traders sold stocks to fund purchases of PowerBall tickets. The Powerball jackpot is up to $1.5 billion. The cash grand prize is estimated at $930 million. If the jackpot gets big enough, it's actually worth your while to play the lottery. If one assumes there is only one winner then the odds are in your favor. And people are playing. Lottery officials said 85.8 percent of possible number combinations had been sold.