YCC (Yield Curve Control)

Yield Curve Control (YCC) is an unconventional monetary policy tool under which a central bank commits to pinning the yield of a particular government bond — typically at a medium or long maturity — at or near a chosen level. Rather than setting a quantity of asset purchases (as in standard quantitative easing), the bank sets a price for borrowing at that maturity and pledges to buy whatever volume of bonds is necessary to enforce it.

The two most cited modern examples are:

• Bank of Japan (BoJ): introduced YCC in September 2016 as part of its "QQE with Yield Curve Control" framework, targeting the 10-year Japanese Government Bond yield around 0%. The BoJ widened the tolerance band several times before formally ending YCC in March 2024.
• Reserve Bank of Australia (RBA): from March 2020 to November 2021, targeted the yield on the 3-year Australian Government bond at 0.25% (later 0.10%) as a pandemic-era stimulus measure. The policy was abandoned in disorderly fashion, and a subsequent RBA review criticised its exit.

YCC also has a historical precedent in the United States: the Federal Reserve capped Treasury yields from 1942 until the 1951 Treasury–Fed Accord to finance World War II debt.

Mechanically, YCC works through the signalling channel (anchoring expectations about the future path of short rates) and the portfolio-balance channel (pushing investors into riskier assets). Proponents argue it can deliver stimulus with a smaller balance-sheet footprint than open-ended QE. Critics note that YCC effectively cedes control of the central bank's balance sheet to bond markets: if investors test the peg, the bank must buy without limit, potentially monetising debt and distorting price signals. Exit is notoriously difficult, as the RBA's 2021 experience showed. For IR and policy researchers, YCC is also significant because it blurs the line between monetary and fiscal policy and raises questions about central bank independence.