MADRID, 18 agosto (Reuters) - Spain announced the following results at Tuesday's Treasury bill auction BANCS. (Amounts bid, allocated in millions of euros) ISSUE YIELD PREVIOUS PRICE PREVIOUS BID ALLOCATED 6-month -0.014 0.021 100.007 99.989 3,548 636 12-month 0.024 0.110 99.976 99.889 8,235 4,815 The bid-to-cover ratio on the 6-month bill was 5.6 versus 4.4 at the last auction. The bid-to-cover ratio on the 12-month bill was 1.7 versus 1.5 at the last auction. For further information, click on and. (Reporting by Madrid Newsroom) Keywords: