BOSTON ( TheStreet) -- Stocks have been swinging wildly this year after rallying in 2009, bewildering investors who've been hoping for a steady recovery.Amid the chaos, there have been some standouts this year, especially among small banks and food companies. Here are the 10 best-performing S&P 500 stocks so far in 2010. The shares are ordered by performance, from the smallest to biggest return. 10. Dr Pepper Snapple Group ( DPS) has advanced 33% in 2010 and 71% during the past 12 months. First-quarter profit tumbled 33% to $89 million, or 35 cents, as revenue declined 1%. The operating margin remained steady at 16%, lagging the tallies of beverage titans Coca-Cola ( KO) and Pepsi ( PEP). Dr Pepper Snapple Group trades at a price-to-sales ratio of 1.7 and a price-to-cash-flow ratio of 5.7, 44% and 53% discounts to industry averages.