COLUMBIA -- South Carolina’s largest publicly traded companies as a whole trailed the stock performance of the nation’s largest firms in 2007. The stock of South Carolina’s 16 largest companies, measured by annual revenue, dropped by 20 percent in 2007, while the S&P 500 Index rose by 4 percent during the same period. Just four of the S.C. companies -- UCI Medical Affiliates, BlackBaud, ScanSource and SCANA -- saw their stock prices increase.

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