Shares in Spyker Cars soared 30% in early Monday trading to be the lead gainer in Amsterdam and were up over 39.5% just after 12:30GMT on speculation the Dutch luxury sportscar maker is close to a deal to buy Saab from General Motors.

“There is some speculation that they can turn Spyker Cars and Saab around, but the way of financing and the whole structure of the possible deal is still unclear,” an anonymous analyst told Reuters this morning.