NEW YORK (Reuters) - The prices of U.S. Treasurysecurities fellThursday amid stronger-than-expected U.S.economic data, including a Chicago PMI reading that beatanalysts' expectations.

The benchmark 10-year Treasury note fell 17/32in price to yield 2.57 percent, up from 2.51 percent atWednesday's close. The 30-year Treasury bond , whichwas briefly down over a point, gave up 29/32 in price for ayield of 3.74 percent, up from 3.69 percentWednesday. (Reporting by Emily Flitter; Theodore d'Afflisio)