Italian industrial group Fiat SpA
Final terms for this transaction continues to be negotiated with the U.S. Treasury and other relevant stakeholders, it said in a statement in which it also announced a first-quarter trading loss of 48 million euros.
If negotiations are concluded successfully, final terms will be set on or before April 30, 2009, it said.
Fiat made no mention of General Motors Corp's
The website of German news magazine Spiegel said Fiat would sign a letter of intent next Tuesday to buy a majority stake in Opel. Fiat and Opel declined to comment.
Fiat shares were up 0.6 percent at 7.52 euros at 1031 GMT (6:31 a.m. EDT). The DJ Stoxx auto index <.SXAP> was down 0.71 percent.
Fiat is working hard to get the support of Chrysler's reluctant creditors and unions to close the deal.
If it fails to clinch a deal by the deadline, the U.S. government is threatening to let Chrysler go bankrupt.
(Reporting by Gilles Castonguay; editing by John Stonestreet)