Italy\'s borrowing costs rose on Thursday in an auction of six-month bonds that raised 8.5 billion euros ($11.3 billion) amid a rise in tension on eurozone debt markets, the Bank of Italy said. The rate rose to 1.772 percent compared with 1.119 percent in the last similar sale last month. The rate had risen to more than 6.0 percent last November when fears that Italy could be on the brink of default rocked the markets.