Asian shares, oil skid as global growth concerns dominate

By Hideyuki Sano TOKYO (Reuters) - Asian shares retreated on Tuesday, with fears of global economic slowdown showing no sign of abating as oil prices plunged on new worries about oversupply by top producers. Japan's Nikkei fell 2.3 percent while Hong Kong's Hang Seng Index fell 1.9 percent, with MSCI's broadest index of Asia-Pacific shares outside Japan falling 1.1 percent after two days of gains since late last week. "Wherever you look - China, oil and the U.S., there is no clear evidence of im