US stocks fell on Thursday as General Motors Corp's shares hit a 23-year low, raising broader concerns among investors about other big US companies, while Exxon Mobil Corp fell on lower oil prices.

GM shares dropped 6 percent to $23.07 after hitting $22.75 earlier, the lowest since August 1982, amid increasing concerns that workers at Delphi Corp could go on strike. Delphi is GM's largest auto parts supplier.

The Dow Jones industrial average was down 0.56 points, or 0.01 percent, at 10,546.69. The Standard & Poor's 500 Index was down 2.62 points, or 0.21 percent, at 1,218.03. The technology-laced Nasdaq Composite Index was down 9.54 points, or 0.44 percent, at 2,166.27.

Copyright Reuters, 2005