The Bernanke Fed has been characterized by an aggressive attack on Treasury yields through all possible means: zero-bound interest rates with a pledge to keep them at record-lows for years to come, purchases of Treasuries and mortgage-backed securities through several programs of quantitative easing (QE), and a maturity extension program dubbed Operation Twist that should push longer-term rates even lower.
FORBES: Romney's Defeat Means Treasuries May Fall Below 1.5% On Fiscal Cliff And Bernanke