Shares of electronics giant Toshiba were tanking after the company revealed it is set to take a larger writedown on its U.S. nuclear business.
Toshiba may seek cash from its American partner Western Digital (WDC) .
Shares in the group fell nearly 16% in Tokyo. Toshiba has lost nearly half its market value since news of the writedown in mid-December. The company also faces the humiliating possibility of being delisted from the Tokyo Stock Exchange.