Have you heard about FEMO? Ed Yardeni, president of Yardeni Research and one of Wall Street's biggest bulls, has a new answer for why stocks keep climbing: not FOMO, but "Fabulous Earnings Momentum." His point: unlike the 1999 dot-com melt-up, where investors chased stocks on hype alone, valuations today are stuck around 20x, not cheap, but not extreme either. What's actually driving the market higher is real earnings growth.(Lark Davis)