Earnings beat estimates, but it perhaps wasn't enough to offset a premium valuation and angst over interest rates. Shares of insurance giant Chubb Limited (CB -3.17%) were falling on Wednesday, down as much as 4.3% before recovering to a 3.1% decline as of 1:30 p.m. ET. Chubb reported earnings last night, and in truth, there wasn't much to complain about for shareholders. However, most insurance stocks were down on Wednesday, as economic concerns moved to the forefront. Given Chubb's premium valuation, at l ...