As the financial crisis intensified and short-term interest rates neared zero, the Federal Reserve began using its balance sheet to support credit markets. It announced a program to buy up to $100 billion in housing-agency debt and up to $500 billion in agency mortgage-backed securities (MBS), aiming to lower mortgage rates and improve mortgage market functioning.
The Federal Open Market Committee (FOMC) voted to greatly expand its purchases of agency MBS and agency debt and to add longer-term U.S. Treasury purchases. This step is widely treated as the point when “quantitative easing” (QE) became a major, unsterilized balance-sheet expansion, not just targeted market support.
With the recovery still fragile, the FOMC decided to keep its holdings of longer-term securities from shrinking by reinvesting principal payments (paydowns) from agency debt and agency MBS into longer-term Treasury securities. This reinvestment policy helped maintain accommodation even when new QE purchases were not being expanded.
The FOMC directed the New York Fed’s trading desk to buy an additional $600 billion in longer-term Treasury securities by the end of the second quarter of 2011. QE2 was designed to support a stronger recovery and move inflation back toward levels consistent with the Fed’s mandate.
In mid-2011 reporting, the Federal Reserve summarized how its Treasury holdings had risen sharply due to reinvestment and the QE2 purchase program. These reports helped make QE’s scale and mechanics more transparent to Congress and the public.
The FOMC launched a maturity extension program (often called “Operation Twist”) to sell or redeem shorter-term Treasuries and buy longer-term Treasuries. Unlike QE1 and QE2, this shifted the composition of the Fed’s Treasury portfolio to put downward pressure on long-term interest rates without expanding the overall size of its Treasury holdings.
With economic growth still moderate, the FOMC continued the maturity extension program beyond its initial end date. This added another large round of selling shorter-dated Treasuries and buying longer-dated Treasuries, aiming to keep longer-term borrowing costs lower.
The FOMC announced it would begin purchasing additional agency MBS at a pace of $40 billion per month. QE3 was notable for being open-ended at the start—tied to improvement in labor market conditions rather than a fixed total dollar amount.
After Operation Twist ended, the FOMC shifted to outright purchases of longer-term Treasuries, initially about $45 billion per month, while continuing $40 billion per month in MBS purchases. This effectively combined the MBS and Treasury legs of QE into a larger ongoing monthly program.
In public remarks in mid-2013, Chair Ben Bernanke indicated that if the economy and labor market continued to improve, the Fed could begin reducing ("tapering") the pace of asset purchases later that year. Market interest rates rose sharply as investors reacted to the possibility of less Fed buying, illustrating how strongly expectations shaped financial conditions.
The FOMC announced the first step in tapering, reducing monthly asset purchases by $10 billion to $75 billion starting in January 2014. This marked the transition from expanding QE3 at a steady pace to a planned wind-down, while the Fed still emphasized that policy remained highly accommodative.
After a series of measured reductions, the FOMC concluded its asset purchase program at the end of October 2014, citing substantial improvement in the labor market outlook. The Fed continued reinvesting principal payments to keep its holdings large, but the main QE phase of adding new securities to the balance sheet had ended.
Quantitative easing programs and tapering (QE1, QE2, QE3) (2008-2014)