U.S. government debt prices added small gains briefly on Friday after data showed personal spending fell and income posted no growth in September, supporting the view of a sluggish economic rebound.

The government said personal spending fell 0.5 percent in September, matching market expectations, while personal income was unchanged on the month.

Its index on core personal consumption expenditure, the Federal Reserve's preferred inflation gauge, was up 1.3 percent on a year-over-year basis. The figure was at the lower end of the Fed's perceived comfort range of 1.0 to 2.0 percent.

The price on benchmark U.S. 10-year notes US10YT=RR had been up as much 14/32, versus a 12/32 gain before the data.

Their yield, which moves inversely to price, briefly touched 3.44 percent, up from 3.45 percent prior to the data. The 10-year yield ended at 3.50 percent on Thursday.