Stock ETFs Tumble; S&P 500 Takes Out 200-Day

U.S. equities staggered into Tuesday’s closing bell as exchange traded funds indexed to the S&P 500 lost 2.6% and fell below a key technical level. Broad-based stock ETFs such as SPDR S&P 500 ETF (NYSEArca: SPY) and iShares S&P 500 (NYSEArca: IVV) sliced through their 200-day moving...