MADRID, 18 giugno (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 -0.476 -0.490 100.112 100.124 2,030 420 9-month -0.406 -0.376 100.293 100.286 3,890 970 The bid-to-cover ratio on the 3-month bill was 4.8 versus 4.8 at the last auction. The bid-to-cover ratio on the 9-month bill was 4.0 versus 3.8 at the last auction. For further information, click on and . (Reporting by Madrid Newsroom) ----------