Every few weeks, a new headline shows up warning that the end is near. A hedge fund manager is "laying the groundwork to profit massively when the economy collapses." A famous short-seller says the market hitting a record high is itself a warning sign. A "record" number of investors have placed bets against U.S. stocks. It's the same story, dressed up in a new headline, and it never seems to stop. In today's email: Why doomsday predictions get so much airtime What the track record of market...