ROME — Premier-designate Mario Monti is holding talks with political leaders, unions and business groups as he tries to put together a cabinet that can steer Italy through its debt crisis.

Despite the speed with which Monti is moving ahead, investors remain nervous and Italy’s borrowing costs rose Tuesday, with the yield on 10-year bonds up 0.10 percentage point at 6.68 percent. Last week’s spike above 7 percent raised fears Italy was heading the same way as other indebted eurozone countries like Greece.

Monti met Tuesday with the center-left Democratic Party and has talks planned with Silvio Berlusconi’s Peoples of Liberty party. Their votes will be crucial in a confidence vote, likely this week, which would seal the start of Monti’s government.