Toshiba's shares were last up 0.5 percent at 224 yen after earlier rising as high as 232 yen, against the backdrop of a broader market downturn. The Nikkei stock average <.n225> was down 1 percent.
Toshiba said on Monday that whether or not Westinghouse files for bankruptcy is ultimately a decision for its board. (Reporting by Tokyo markets team; Editing by Stephen Coates)