Investors and analysts alike cheered a sizable asset sale announced by the company.Veteran insurance company Allstate (ALL 5.23%) hit a major stock-market milestone on Wednesday. The company shares surged by 5% to close at the highest level in their history. The soaring company also benefited from several positive analyst moves. Allstate's rise trounced that of the S&P 500 index, which rose by slightly under 0.4% on the day. A large asset saleInvestors were particularly excited by a major divestment announc ...