The automaker said it had repaid 2.8 billion dollars of its loans from the U.S. Treasury and Export Development Canada by the end of March and planned to repay the remaining 5.6 billion dollars by June.
The Dow Jones industrial average dropped 72.47, or 0.66 percent, to 10,897.52. The Standard & Poor's 500 index fell 6.99, or 0.59 percent, to 1,182.44 and the Nasdaq was down 5.65, or 0.23 percent, to 2,431.16.