Among the biggest trends in the world of markets is the rise of passive investing. Rather than pay high fees to active mutual fund managers (who often fail to beat the market), people are pouring money into passive strategies that track major indices, but with little cost. So what are the ramifications of this trend for investors who choose to remain active? On this week's Odd Lots podcast, we speak with Michael Mauboussin, who heads global financial strategies at Credit Suisse and is not just an expert on the world of investing, but also on the role of luck in success. As he sees it, trading is like a game of poker, and in poker you want to play against weaker, less-skilled players. But as more and more of those less-skilled players opt not to trade (choosing passive strategies) then the game gets harder.