Latest / Monetary Policy Explained with Fexingo: Central Banks, Money Supply, and Interest Rates / How Central Banks Learn From Their Own Policy Mistakes
Transcript
- Lucas: Central banks don't admit mistakes easily. They're conservative institutions — they prefer to frame policy shifts as 'recalibrations' or 'enhancements' rather than corrections. But over the past twenty years, three major central banks have made errors so consequential that they inspired formal, institutionalized learning processes. Luna: And we're not talking about 'oops, inflation came in a bit high.' We're talking about decisions that made crises worse. Which ones are on your list? Lucas: The Bank of Japan's early 2000s quantitative easing — which started in 2001 — is the first. It was the first major QE program in modern history. The BOJ committed to it, it worked in stabilizing markets, but then they spent nearly a decade trying to exit. They hiked rates too early in 2006, inflation stayed stubbornly low, and they had to re-enter QE in 2010. The whole sequence was a policy whiplash that cost the economy years of lost growth. Luna: And they eventually wrote it up. The 2016 Comprehensive Assessment was their formal mea culpa. They basically said, 'We misjudged the persistence of low inflation and we underestimated how hard it would be to normalize.' Lucas: Exactly. The Comprehensive Assessment was published in September 2016 after a year-long internal review. It didn't just finger-point — it changed how the BOJ thought about the policy framework. They introduced yield curve control as a direct result, capping the ten-year government bond yield at zero percent. The lesson was: don't fixate on the quantity of reserves. Focus on the price of money along the curve. Luna: That's a concrete institutional change. But it took them fifteen years to formalize that lesson. The second case — let me guess — the European Central Bank's 2011 rate hikes? Lucas: That's the one. In April and July of 2011, the ECB raised its main refinancing rate from one percent to one point five percent. The stated reason was inflation expectations — headline CPI was above two percent. But the eurozone was still reeling from the sovereign debt crisis. Greece, Ireland, Portugal were in bailout programs. Spain and Italy were under pressure. Raising rates made the crisis worse. Luna: Mario Draghi reversed those hikes within months after he became president in late 2011. But the damage was done. The ECB's own staff estimated later that the 2011 tightening reduced eurozone GDP growth by about half a percentage point in 2012. Lucas: And the institutional response came in the form of the ECB's post-mortem — the 'Assessment of the monetary policy strategy' that they published in 2021. That review acknowledged that they had overreacted to supply-driven inflation and underweighted the risk of a double-dip recession. It led directly to the ECB's new symmetric inflation target of two percent — meaning they now accept overshoots as well as undershoots, which they didn't before. Luna: So the 2011 error was the catalyst for a more flexible, more tolerant framework. And the third case — the Bank of England's 2022 gilt market crisis — is the most recent. That's fresh enough that the institution is still redesigning itself. Lucas: Right. In September 2022, the UK government announced a mini-budget with large unfunded tax cuts. The gilt market sold off violently. Pension funds that used liability-driven investment strategies faced margin calls. The Bank of England had to step in with a temporary gilt purchase program — essentially quantitative easing in reverse — to restore orderly conditions. But here's the mistake: the BOJ had not anticipated the systemic risk embedded in the LDI space. Luna: Their own Financial Policy Committee had flagged LDI risks in 2019 and 2020 but didn't require pension funds to hold enough liquidity buffers. So when the shock hit, the system froze. The BOE's response was fast, but the question is: did they learn? Lucas: They did. In March 2023, the BOE published a review — 'The 2022 Gilt Market Crisis: Lessons for the Bank of England.' It explicitly said that the FPC should have been more intrusive in regulating LDI. They now require pension funds to maintain minimum liquidity buffers for stress scenarios. And the BOE reformed its own crisis toolkit — they've established a new Contingent Nondomestic Repo Facility, which is a standing facility for gilt market liquidity support. It's designed to be deployed within hours, not days. Luna: So in all three cases, the mistake wasn't just a bad decision — it was a failure of institutional design. And the fix was to build new frameworks that force the institution to remember the mistake. Lucas: Exactly. And that's the deeper lesson for listeners. When you hear a central bank announce a 'strategic review' or a 'framework assessment,' that's often the institutional equivalent of a post-mortem. It means they recognized a systematic weakness and are trying to build a circuit-breaker into their own decision-making. Luna: We should pause here — I want to say, if you've been following along and these kinds of stories about how institutions actually learn have made something click for you, you might consider supporting the show. A couple of dollars a month is genuinely what keeps these going — buy me a coffee dot com slash fexingo. No pressure, just if you've gotten value out of it. Lucas: Yeah, and we mean that — small amounts add up. It's how we stay independent. Back to the thread: one thing that strikes me is that all three central banks published their reviews publicly. That transparency itself is a form of accountability. The BOJ, ECB, and BOE all released detailed documents with data, analysis, and explicit policy changes. That's not a given. Luna: The Federal Reserve is the outlier here. After the 2021-2023 inflation surge, the Fed hasn't done a formal post-mortem of its own. There's been internal debate — the 'Brookings papers' and speeches by former officials — but no official Fed publication that says 'we misjudged inflation persistence.' Why not? Lucas: Partly institutional culture. The Fed has a long tradition of not retroactively criticizing its own decisions. They see it as protecting the institution's credibility. But there's a cost: without a formal review, the lessons may not be institutionalized. It's harder to change the framework if you don't publicly acknowledge the error. Luna: There is a counterargument, though. The Fed's 2012 adoption of a two percent inflation target was itself a response to the 1970s inflation mistakes. That was a framework change that happened without a formal post-mortem. So maybe the process can be informal. Lucas: Maybe. But I'd argue the 2012 framework was the result of years of academic and internal debate — it wasn't a single error catalyzing change. The three cases we discussed are different: they were acute, visible mistakes that forced quick institutional redesign. The Fed's 2021-2023 episode was more of a slow-burn error — they called inflation 'transitory' for too long — and then they hiked aggressively. The correction happened in policy, but the framework hasn't changed. Luna: So the question is: will the Fed eventually do a formal review? Or will the next crisis force them into it? Because one thing that's clear from history is that central banks learn best when they have to. Lucas: And that's the uncomfortable truth. Institutional learning is often reactive. It takes a crisis — or a near-crisis — to overcome the bureaucracy. But once the framework is in place, it can prevent the same mistake from happening twice. The BOJ hasn't repeated its 2006 exit error. The ECB hasn't raised rates prematurely during a debt crisis. The BOE now has a standing liquidity facility for gilt markets. That's progress. Luna: One more thing: the role of individuals. Draghi reversed the 2011 hikes. Kuroda pushed through the Comprehensive Assessment. Bailey had to defend the BOE's intervention. Do these frameworks survive leadership changes? Lucas: That's the test. A framework is only as strong as the next governor's willingness to follow it. But if the review process is public and the changes are codified — like the ECB's symmetric target or the BOJ's yield curve control — they create a precedent that future policymakers have to explicitly reverse. That's harder than just ignoring an unwritten rule. Luna: So for anyone watching central banks now — whether it's the Fed's next move or the BOJ's eventual exit from yield curve control — the question isn't just 'what will they do?' It's 'what framework are they operating under, and did they learn from their last mistake?' Lucas: Exactly. And if you want to understand the next policy surprise, look at the last policy error. Central banks are more predictable than they seem — if you know where they've been burned before.