By Deborah Levine
NEW YORK (MarketWatch) -- Treasury prices stayed up and the dollar fell against the euro on Tuesday after the Conference Board's index on consumer confidence rose to 53.5 in August. Yields on 10-year notes (UST10Y 2.49, -0.04, -1.70%) , which move inversely to prices, fell 3 basis points to 2.50%. The euro (EURUSD 1.2728, +0.0066, +0.5213%) rose to $1.2724, up from $1.2664 in late North American trading on Monday. The dollar index (DXY 82.94, -0.22, -0.27%) , a measure of the U.S. unit against a basket of currencies, fell to 82.969, from 83.184 late Monday. Separately, the purchasing managers' index for the Chicago region fell to 56.7 in August from 62.3 in July.