Asian stocks gained, benefiting from reports in China of looser rules allowing for insurers to invest in commercial lenders and as optimism grew over policy support for urban infrastructure spending. The Hang Seng jumped 2.16% to 22,270.91, the Nikkei rose 0.39% to 9,468.84, the Kospi added 0.61% to 1,947.04 and the S&P/ASX was up 0.37% at 4,520.40.