US STOCKS-Wall St marks worst day since August on Libyan unrest
February 22, 2011 at 16:38 PM EST
* Dow falls 1.4 pct, S&P loses 2.1 pct, Nasdaq off 2.7 pct * For up-to-the-minute market news see [STXNEWS/US] (Updates to close, changes byline)