U.S. stocks stumble on potential Greek exit
NEW YORK (MarketWatch) — U.S. stocks tumbled on Wednesday, echoing a slide in equities around the globe, on intensifying concern Greece could exit the euro and as the region’s leaders gathered.  The market’s fall comes down to the “unwavering focus on Europe and what’s going to happen there,” said Mark Luschini, chief investment strategist at Janney Montgomery Scott.  An upbeat report on the U.S. housing market only slightly curbed Wall Street’s selling, with the uncertainty over events in Europe overtaking sentiment.
http://www.marketwatch.com/story/us-stocks-st...2012-05-23