US STOCKS-Wall St falls on Libya but economic optimism helps By: Reuters: Company News February 22, 2011 at 11:39 AM EST * Indexes off: Dow 0.6 pct, S&P 0.8 pct, Nasdaq 1.2 pct Read More >> Related Stocks: CBOE Volatility Index Delta Air Lines Home Depot Standard & Poors 500 Wal-Mart Stores, Inc.