What is yield curve control and which countries have used it?

The short answer

Yield curve control is the practice of fixing not just the short-term policy rate but also a specific longer-term bond yield — typically the 10-year government bond. The central bank commits to buy unlimited quantities of bonds at a price consistent with the target yield, effectively capping borrowing costs along the curve.

The mechanism is conceptually simple but operationally radical: the central bank surrenders pricing of the bond it targets and stands ready to absorb whatever supply the market wants to sell. This works as long as markets do not test the commitment with sustained selling pressure.

Only three modern episodes exist: the Federal Reserve from 1942 to 1951 to finance World War II, the Bank of Japan from September 2016 to March 2024, and the Reserve Bank of Australia briefly from March 2020 to October 2021. The Australian exit was particularly chaotic and offers important lessons.

→ New to monetary policy? What is forward guidance and how does it work?

What the data shows

Three modern YCC episodes provide a comparative empirical record across very different macro contexts.

The empirical record (Federal Reserve historical archives, BoJ, RBA, 2016-2024):

• The Federal Reserve capped Treasury yields at 2.5% on long bonds and 0.375% on bills from April 1942 to March 1951, when the Fed-Treasury Accord ended the regime
• The Bank of Japan introduced YCC in September 2016 with a 10-year JGB target of approximately 0%, exiting on March 19, 2024
• The Reserve Bank of Australia targeted a 0.10% yield on the April 2024 Australian government bond from March 2020 to October 2021
• Empirical work (Shiratsuka 2024) finds the BoJ YCC was “highly effective in stabilizing interest rates from short to long term, at least up to early 2022”

The exception that nuances the record: the RBA episode shows that YCC commitments can break dramatically when inflation pressures emerge — Australian 3-year yields jumped more than 50 bp in days as the RBA stopped defending the cap, damaging credibility.

→ Dataset: US 10-year Treasury yield dataset

Why it happens — the macro mechanism

YCC operates through three channels distinct from conventional QE.

Direct price-setting channel. Unlike QE, which targets a quantity of asset purchases, YCC targets a price (yield) directly. The central bank commits to absorb whatever supply emerges at that price. This means the size of the balance sheet adjusts endogenously to whatever volume markets want to sell or buy at the targeted yield.

Credibility-test channel — the asymmetric vulnerability. Contrary to the view that YCC is simply a more powerful version of QE, the Australian experience reveals that YCC is uniquely vulnerable to credibility tests. When markets believe the cap, the central bank may not need to buy at all; when markets stop believing, the central bank must either accept unlimited balance sheet expansion or break the commitment publicly. There is no graceful middle path.

The 2021 RBA exit illustrated this brutally: the central bank effectively walked away from its target without warning, and the resulting credibility damage was severe.

Currency and capital flow channel. Capping domestic long yields while foreign yields rise creates rate differentials that pressure the currency. The yen weakened from approximately 110 to 150 per dollar over 2021-2022 as US yields rose while Japan held its YCC cap, illustrating this transmission directly.

Synthesis by regime: the Fed’s WW2 YCC operated in a regime of fiscal dominance and capital controls, with no inflation conflict (until 1947-1951 when the regime broke); the BoJ’s 2016-2024 YCC operated in a chronic disinflation regime where the cap was largely unchallenged until 2022; the RBA’s 2020-2021 YCC operated under pandemic uncertainty and broke as inflation accelerated faster than the central bank had communicated.

YCC is a peace treaty with the bond market: it holds as long as no one tests it, and breaks loudly the day someone does.

→ Framework: Central banks, monetary policy and market transmission

What it means for different economic actors

Savers. YCC compresses returns on government bonds and savings vehicles tied to government yields. The case is built out in the Eco3min financial repression framework. Japanese retail savers experienced near-zero returns on JGB-linked instruments throughout 2016-2024, accelerating outflows toward foreign assets and equities.

Investors. YCC creates predictable but distorted bond market pricing. JGB market liquidity fell sharply during BoJ YCC, with several days in 2022 recording zero trades in the on-the-run 10-year. The corollary is heightened volatility on exit, as the 2022-2024 yen weakness illustrated.

Foreign capital allocators. YCC creates one-sided bets: as long as the cap holds, foreign investors face limited upside but unlimited downside if the cap breaks. This asymmetry historically draws speculative shorts (the BoJ faced repeated speculative attacks on its YCC ceiling in 2022-2023).

A common error is to view YCC as simply a more aggressive QE. The fundamental difference is that YCC commits to a price, not a quantity, which exposes the central bank to unlimited balance sheet expansion if the commitment is tested.

Practical observation

Go deeper

Related questions

• Why did the BoJ finally abandon YCC in 2024?
• What is forward guidance and how does it work?
• Fed balance sheet policy vs conventional QE
• Zero lower bound constraint on policy

Frequently asked questions

Why did the Federal Reserve use YCC during World War II?

The Fed agreed to cap Treasury yields starting in April 1942 to ensure the federal government could finance the war effort at predictable, low borrowing costs. The arrangement worked during the war but became increasingly problematic afterward as inflation rose and the Treasury opposed Fed efforts to normalize. The 1951 Fed-Treasury Accord ended YCC and restored Fed independence — a precedent often cited when discussing modern fiscal dominance risks. The episode shows that YCC can persist for years if combined with capital controls and political consensus, but eventually conflicts with inflation control.

How does YCC differ from quantitative easing?

QE targets a quantity of asset purchases (e.g., $80 billion of Treasuries per month) and lets the price (yield) adjust freely. YCC targets a price (yield) and lets the quantity adjust freely. This means the central bank’s balance sheet expansion under YCC is endogenous — determined by how much supply the market wants to sell at the targeted yield. In quiet markets, YCC may require very little buying; in stressed markets, it can require unlimited purchases, creating a trap.

Why was the Australian YCC exit so chaotic?

The RBA had committed in March 2020 to keep the April 2024 government bond yield at 0.10%, effectively a 3-4 year fixed rate target. As inflation accelerated through 2021, market participants began testing the cap by selling Australian sovereign bonds. The RBA initially defended but then suddenly stopped buying, with no formal announcement, on November 2, 2021. The yield on the targeted bond jumped from approximately 0.10% to 0.78% within days. Governor Lowe later acknowledged the exit handling damaged the central bank’s credibility, illustrating that YCC carries asymmetric reputational risk.

Last updated — 28 May 2026