By Deborah Levine
NEW YORK (MarketWatch) -- Treasury prices turned up slightly on Monday as U.S. stock futures came off their highs. Attention is already turning to the Federal Reserve meeting on Tuesday and whether the central bank will announce a large asset-buying program, which would support Treasurys. Trading could be subdued until that announcement, analysts said. The only economic report of the day is on home builders' confidence. Yields on 10-year notes (UST10Y 2.74, 0.00, 0.00%) , which move inversely to prices, fell 1 basis point to 2.73%. Also, the Fed will be purchasing Treasurys as part of an existing program to rollover cash from its maturing mortgage-bond holdings into U.S. debt.