Asian stocks gained Tuesday after Wall Street gave back some of last week's huge gains, the American and Chinese presidents met and China's consumer spending shrank in a sign its economy is weakening. Shanghai, Tokyo and Hong Kong, which are the bulk of the region's market capitalisation, advanced. South Korea and Sydney declined. Oil prices retreated. Wall Street's benchmark S&P 500 lost 0.9 per cent on Monday, giving back part of last week's 5.9 per cent surge after lower US inflation encouraged hopes the Federal Reserve might ease off planned rate hikes to rein in surging prices. Presidents Joe Biden...