This is not, to put it mildly, a good time to be investing in stocks. The winds and tides of the market are blowing resolutely against you, which reduces your odds of making any real money to worse than an ant’s chances of making it across a freeway at rush hour. Those tides and winds seem to be paying special attention to Chinese stocks, pulling even the most robust of them lower. But a bad time for buying is a great time for working up a watch list, and Renren (RENN), one of the top candidates for the title...