Healthcare exchange traded funds defied the market's weakness Monday on news that health-insurance giant WellPoint (WLP) agreed to buy out Amerigroup (AGP). The deal valued one of the largest players in Medicaid at $4.9 billion or about $92 a share. Amerigroup shares shot up 38% to close at 88.79. IShares Dow Jones U.S. Healthcare Provider (IHF) gapped up 2.14% to 65.02. The ETF appears to be forming a cup-with-handle pattern with a 66.18