The Most Important Number in Global Finance Was Made Up on TV
Where does the 2% interest rate come from?
I was wondering where that 2% inflation target came from.
The Fed uses it. The ECB uses it. The Bank of England, the Bank of Canada, and the Reserve Bank of Australia all do the same. Every major central bank on the planet anchors its monetary policy to this single number. The interest rates, the quantitative easing and forward guidance, they are all calibrated to hit or maintain 2%.
So I looked into it and I wasn’t really expecting that.
A Minister, a TV Camera, and a Round Number
Apparently, it started in New Zealand, in 1988. The finance minister of the time, Roger Douglas, was asked on television whether he was satisfied with inflation falling from 15% to 10%. He said no and that he wanted 0 to 1%. It was an off-the-cuff answer on live TV, and it caught even the Reserve Bank of New Zealand by surprise.
The RBNZ then had to turn a casual remark into policy. They estimated a 0.75% upward measurement bias in the CPI, rounded it to 1%, and set a formal target band of 0 to 2%. The number was reverse-engineered from a political soundbite and a statistical adjustment.
New Zealand adopted it officially in 1990. Canada followed shortly after and landed on 2% as well. The UK came next. Most of the developed world eventually did the same.
The ECB defined price stability as “below 2%” in 1998, refined it to “below, but close to, 2%” in 2003, and finally moved to a symmetric 2% target in July 2021. The Fed only made it official in January 2012, under Bernanke, though an informal consensus around 2% had existed inside the FOMC since about 1996.
The entire framework traces back to one TV appearance.
What Central Banks Say It Does
The official justification goes like this: a small, positive, predictable rate of inflation gives the economy breathing room.
At 2%, wages and prices can adjust gradually without triggering deflation. Deflation is the real fear. When prices fall, the consumers wait, spending drops, corporate revenues shrink, and debt gets heavier in real terms.
Japan’s lost decades showed how a deflationary spiral can paralyze an economy for a generation.
A positive target also gives central banks space to cut interest rates during a recession. If inflation runs at 2% and the neutral real rate sits around 1%, nominal rates land somewhere around 3%. That leaves room to cut before hitting zero. At 0% inflation, that buffer disappears.
The 2% target also serves as an anchor for expectations. If businesses and households believe inflation will stay at 2%, they price contracts, set wages, and make investment decisions accordingly. The target becomes self-reinforcing. Entrepreneurs need stability.
That’s the theory and it’s coherent. But I was still unsure about a few things. Does it have to be 2% specifically, or would any credible, well-communicated number produce the same effect?
The Academic Foundation That Doesn’t Exist
No peer-reviewed study concluded that 2% is the optimal inflation rate. Central banks adopted it first, then built frameworks around it.
Former Kansas City Fed President Thomas Hoenig put it plainly: “It is, I think, an error to say 2% is somehow magically the right number.”
Josh Bivens, director of research at the Economic Policy Institute, called the target “relatively arbitrary.”
In 2021, Fed economist Jeremy Rudd published a paper arguing that the standard framework linking inflation expectations to actual inflation “rests on extremely shaky foundations.” The paper didn’t target the 2% number directly. It went after the theoretical model that’s supposed to make the whole system work: the idea that anchored expectations are what keep inflation stable. If that link is weaker than assumed, the intellectual case for any specific target gets thinner.
None of this is fringe criticism. These are people who worked inside the institutions that enforce the target.
Should It Be Changed?
Olivier Blanchard, former IMF Chief Economist, has argued for a 4% target. The logic is straightforward: a higher target means higher nominal interest rates in normal times, which means more room to cut during crises. A 4% target puts normal rates around 6 to 7%, giving central banks real ammunition before they hit zero. Larry Summers has made similar arguments.
On the other side, Bernanke’s counterargument is simple: if you move to 4%, people ask why not 6%? The 2% target works partly because everyone believes in it. Change the number, and you risk unanchoring the very expectations that make the system function.
Both sides have a point. But neither resolves the core issue: the number was never optimized. It was adopted, then defended.
Could It Actually Change?
That’s unlikely because three forces lock it in place.
The first is credibility. Central banks have spent decades building trust around 2%. Changing the target would raise the question of whether any number is truly stable, and that uncertainty alone could destabilize expectations.
The second is that governments benefit from the status quo. They borrow in nominal terms, and inflation erodes the real value of that debt every year without a single dollar being repaid. It pushes wages into higher tax brackets without requiring a vote.
It also makes nominal GDP growth look healthier, which improves debt-to-GDP ratios on paper. For any government running persistent deficits, 2% inflation works as a slow, invisible subsidy.
The third is career risk. No central banker wants to be the one who publicly accepted more inflation. Even if the economics support a change, the optics are career-ending. The institutional incentive runs entirely toward defending the number.
So 2% it is, and will be.
About me: I'm Antoine Mecker. I write about markets, macro, geopolitics, crypto, and tech, and how all of it connects to the way money moves through the world. I also build quantitative trading algorithms, which keeps me close to how markets actually behave. More of my work lives at meckercapital.com. This is not financial advice, and nothing here is a recommendation to buy or sell anything. Always do your own research.