MADRID, 17 luglio (Reuters) - Spain announced the following results at Tuesday's Treasury bill auction . (Amounts bid, allocated in millions of euros) ISSUE YIELD PREVIOUS PRICE PREVIOUS BID ALLOCATED 3-month -0.470 -0.510 100.110 100.120 2,530 735 9-month -0.387 -0.389 100.280 100.281 5,935 1,765 The bid-to-cover ratio on the 3-month bill was 3.4 versus 4.5 at the last auction. The bid-to-cover ratio on the 9-month bill was 3.4 versus 2.3 at the last auction. For further information, click on and . (Reporting by Madrid Newsroom)