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It's an understatement to say that investors have done well this year. The S&P 500 (SNPINDEX: ^GSPC ) is up by double-digit percentages year to date as stocks have soared across nearly every sector. Health care has its share of big winners this year, but which medical stocks on the S&P are giving you the best return for your money?
From biotech to devices, three key stocks have performed better than the rest this year. Motley Fool contributor Dan Carroll takes you through the S&P 500's three big winners on the year, and tells you if these stocks have room to run even higher in 2013's second half.