Asian markets tumbled in early trading Thursday after overnight losses on Wall Street and amid persistent worry over the likely impact of a US recession.Hong Kong's Hang Seng Index fell as much as 4.4 percent in morning trade, while on the Chinese mainland, the Shanghai Composite Index dropped 6.5 percent to 3,516.33 - its lowest level since June.Both indexes later came off their early lows.
Asian markets tumble in early trading