The blue chips nose-dived 513 points into correction territory, while the broad S&P 500 shed 4.8%, after anxiety over the economy sent traders racing out stocks and commodities. Today's Markets According to preliminary calculations, the Dow Jones Industrial Average fell 513 points, or 4.3%, to 11,384, the S&P 500 tumbled 60.2 points, or 4.8%, to 1,200 and the Nasdaq Composite slid 137 points, or 5.1%, to 2,556. The FOX 50 tumbled 37.5 points, or 4.2%, to 864. Related Video Economic Concerns Drive GM Shares Down FOX Business Brief: GM and markets Related Stories For Stocks, 'This is Where it Gets...