Here’s something the bulls should be worried about, but are not: The volume of short selling, which has been increasing each month since last December. When it comes to the short interest data, the bulls are kidding themselves in thinking that the volume of short selling is a contrarian indicator—with lots of shorting being a bullish omen, and vice versa. But this contrarian interpretation is wrong, according to a recent study that found short sellers on balance are right more than they’re wrong, and that in turn means it’s worrisome that the volume of short selling has risen so steadily this year.
http://www.marketwatch.com/story/this-is-what-should-really-worry-you-about-stocks-2017-07-21
