NEW YORK (MarketWatch) -- Treasury prices added to gains and the dollar lost a little ground on Friday after a report showed U.S. sales of new homes unexpectedly slowed in February. The dollar index DXY -0.27% , which measures the greenback's performance against six major currencies, fell to 79.448 from 79.745 late Thursday. The euro EURUSD +0.2416% rose to $1.3245, from $1.3235 before the data and from $1.3170 in North American trading Thursday. Yields on 10-year notes 10_YEAR -1.88% , which move inversely to prices, declined 6 basis points to 2.22%, from 2.25% before the housing report.