Treasurys buffeted as Bernanke talks on Capitol Hill about asset purchases, while up in New York, the Fed executes another step in the program, buying $7.51B in Treasurys maturing 2015-2016, of $27.685B offered by dealers. Bonds trim gains but are still higher on the low end: 10-year yield -0.01 to 3.73%; 5-year -0.03 to 2.38%; 2-year -0.03 to 0.825%.