October spike places S&P 500 on firmer ground By: MarketWatch October 27, 2015 at 11:02 AM EDT The S&P 500’s steep October spike places it atop the 200-day moving average, and on firmer technical ground. Read More >> Related Stocks: Celgene Corp Facebook Market Vectors Semiconductor ETF Maxim Integrated Standard & Poors 500 United States Oil Fund