NASDAQ Composite Falls Below 4,000 With High Sell-Offs In Biotechnology And Momentum Stocks, The Lowest For A Week Since 2012

U.S. stocks plummeted amid a volatile exchange Friday, causing the NASDAQ Composite (INDEXNASDAQ:.IXIC) to close 1.3 percent lower, below the 4000 mark, making it the lowest ending for a week since 2012.