The sell signals keep stacking up for the S&P 500

The stock market just flashed two signs that it could be time for investors to sell. The S&P 500 dropped below its 50-day moving average, a technical signal hinting at more weakness. Global investors also have historically low cash levels, which is a sell signal, BofA said. The stock market sell-off in recent days has tripped a number of warning signals that point to more pain ahead for investors. The tech sell-off stretched into a fourth session on Tuesday, declining on a cocktail of worries whil ...