MILAN (AP) — Italian Premier Mario Monti saw nearly seven months of confidence-building by his government wiped out by Wednesday, when the country's borrowing rates in a bond auction skyrocketed back near levels last seen in December.

A sale of 12-month bonds, a warm-up for Thursday's weightier longer-term debt auction, demonstrated the speed with which market jitters spread from Spain following Madrid's weekend concession that its banks need a bailout.

Italy paid an interest rate of 3.972 percent — up from 2.34 percent in a similar auction last month — to borrow €6.5 billion ($8.12 billion) in 12-month money from bond markets. Though demand was strong, the high rate suggests investors worry Italy may eventually need a rescue of its own.