S&P 500 threatens a truly longer-term bearish shift By: MarketWatch September 22, 2015 at 12:08 PM EDT The S&P 500 Index is challenging a truly longer-term trending indicator, and a violation would raise the latest red flag. Read More >> Related Stocks: CONSUMERS STA China Largecap Ishares ETF Emrg Mkts Ishares MSCI ETF Europe 350 Ishares ETF HEALTHCARE MATERIALS Standard & Poors 500