Analysis: Positive real yields may spell more trouble for U.S. stocks

A hawkish turn by the Federal Reserve is eroding a key support for U.S. stocks, as real yields climb into positive territory for the first time in two years.
Analysis: Buy the bounce? Investors watch valuations, technical levels to decide

As stocks attempt to climb back from a brutal sell-off, investors are watching a variety of metrics to decide whether to buy the rally or brace for more declines.