Charting the S&P 500’s precarious posture By: MarketWatch July 07, 2015 at 11:56 AM EDT The S&P 500 Index is challenging its 200-day moving average, and a violation would raise the flag to a primary trend shift. Read More >> Related Stocks: Europe 350 Ishares ETF Nasdaq Biotechnology Ishares ETF S&P Regional Banking ETF SPDR Standard & Poors 500 United States Oil Fund