An investment banker called Guido Roberto Vitale has drawn up the latest in a series of plans for troubled Fiat which would see the Italian state take a stake in the group's loss-making car arm, Italian newspapers said on Thursday, according to Reuters. Reuters cited the papers saying that, under Vitale's plan, the state would take 33.7% of a group linking Fiat Auto and Fiat's 56% stake in sports car group Ferrari with the government likely to invest via an infrastructure fund linked to the Treasury.