Health care’s 2011 secret? Fewer patients By: MarketWatch May 25, 2011 at 16:28 PM EDT Insurers have led the health-care sector to first place among S&P components for 2011, and the reason seems to be fewer patients Read More >> Related Stocks: Aetna Biogen Idec Cerner Corp Cigna Corp Humana Intuitive Surgical Standard & Poors 500 UnitedHealth Group