Appaloosa Management’s David Tepper says he is worried further tightening of monetary policies from global central banks will hurt the stock market. “I’m leaning short on the equity markets. I think the upside/downside [risk here] just doesn’t make sense to me when I have so many central banks telling me what they are going to do,” the hedge fund manager said Thursday on CNBC’s Squawk Box. This is a tough level [for the S&P 500] to talk about robust returns.”