Asian shares and global stock futures tumbled on Wednesday (Sep 4), led by a heavy decline in technology names and as worries about the global growth outlook drove investors out of risky assets, while oil prices hit multi-month lows. Stock benchmarks in Tokyo and Taipei led the slump in Asia, each falling more than 3 per cent, while MSCI's broadest index of Asia-Pacific shares outside Japan was last 1.8 per cent lower. September has historically been a bad month for stocks, though analysts