History doesn’t repeat itself, but it does rhyme, Mark Twain probably never said. That’s most true in financial markets, where bullish and bearish phases follow certain clear, discernible patterns. “Bull markets are born on pessimism, grow on skepticism, mature on optimism and die on euphoria,” the late, great Sir John Templeton surely did say. Problem is, when you live through a bull or bear market, you’ll likely get swept up in the prevailing sentiment and will be unable to put things in perspective—especially if you’re young or new to investing. Which brings us to a report by TD Ameritrade about the investing habits of the much-chronicled millennials, who are rapidly replacing baby boomers on the economy’s center stage.via