Japan's Nikkei 225 stock index up 5.5% as world markets gyrate under tariffs uncertainty

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Asian markets opened higher on Tuesday, with Japan’s Nikkei 225 share benchmark up 5.5% after it fell nearly 8% a day earlier.

The rebound followed a wild day on Wall Street as U.S. stocks careened after President Donald Trump threatened to crank his double-digit tariffs higher.