A man looks at the rate of the Tokyo Stock...

A man looks at the rate of the Tokyo Stock Exchange at the quotation board of a security company in Tokyo. (March 10, 2011) Credit: TOSHIFUMI KITAMURA/AFP/Getty Images

Japanese shares are plunging in early trading Monday in the first business day after the devastating earthquake and tsunami.

The benchmark Nikkei 225 stock average shed 494 points, or 4.8 percent, to 9,760.45.

Worries about the economic impact of the disaster, including power shortages, triggered a broad sell-off that hit all sectors.

The dollar was trading at the lower 81-yen level, down from the high 82-yen levels Friday.

On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra talks with Dunia Sibomana-Rodriguez about winning a 3rd state title and possibly competing in the Olympics in 2028, plus Jared Valluzzi has the plays of the week. Credit: Newsday/Steve Pfost

Sarra Sounds Off, Ep. 17: Olympics a possibility for Long Beach wrestler? On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra talks with Long Beach wrestler Dunia Sibomana-Rodriguez about pursuing a third state title and possibly competing in the Olympics in 2028, plus Jared Valluzzi has the plays of the week.

On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra talks with Dunia Sibomana-Rodriguez about winning a 3rd state title and possibly competing in the Olympics in 2028, plus Jared Valluzzi has the plays of the week. Credit: Newsday/Steve Pfost

Sarra Sounds Off, Ep. 17: Olympics a possibility for Long Beach wrestler? On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra talks with Long Beach wrestler Dunia Sibomana-Rodriguez about pursuing a third state title and possibly competing in the Olympics in 2028, plus Jared Valluzzi has the plays of the week.

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