All-time stock market high rattles investors By: CNBC.com News April 04, 2014 at 16:19 PM EDT The S&P 500 briefly touches an all-time high before crumbling, much like yesterday. Investors rotate out of high-fliers like biotechs. Read More >> Related Stocks: Nasdaq Biotechnology Ishares ETF S&P Semiconductor SPDR Sentinelone Inc Cl A TECHNOLOGY