US Stocks Stumble, Fall to New 2011 LowsU.S. stock markets fell Monday, the first day of the third quarter, as investors were once again spooked by news coming out of the European Union on sovereign debt concerns.SavePrintFrank Yu10/3/2011|Updated: 10/1/2015We had a problem loading this article. Please enable javascript or use a different browser. If the issue persists, please visit our help center.