By Deborah Levine NEW YORK (MarketWatch) -- Treasury prices extended gains on Thursday, pushing yields lower, after the Labor Department said jobless claims unexpectedly rose 8,000 to 480,000 in the latest week. Yields on 10-year notes (UST10Y 3.70, +0.06, +1.73%) fell 5 basis points to 3.65%. A separate report said U.S. productivity rose 6.2% in the fourth quarter. Treasurys posted slight gains before the data as stocks fell amid more concerns about the fiscal stability of Spain and Portugal.

Source