Latest / Monetary Policy Explained with Fexingo: Central Banks, Money Supply, and Interest Rates / How Central Banks Use Forward Guidance as a Policy Tool
Transcript
- Lucas: Let's talk about central bankers' favorite rhetorical weapon — forward guidance. Not the mysterious 'we'll do what it takes' kind, but the specific, quantitative kind where a central bank says 'we plan to keep rates at zero until unemployment hits X' or 'the policy rate will follow this published path.' Luna: And the whole point is to shape expectations before you actually move rates, right? To give markets a map so they don't panic. Lucas: Exactly. Because monetary policy works through expectations. If a central bank can convince markets they'll keep rates low for years, long-term bond yields fall, mortgage rates drop, the currency weakens — all without the central bank buying a single asset. That's the magic. The problem is, promises are cheap, and credibility is expensive. Luna: Let's take an early example. The Bank of Canada under Mark Carney in 2009 — they published a conditional path for the policy rate. It was a table showing rates staying near zero until 2011, I think. Lucas: That's right. April 2009, the Bank of Canada — first G7 central bank to issue explicit, date-based forward guidance. They said 'conditional on the outlook for inflation, the target overnight rate will be held at 0.25 percent until the end of the second quarter of 2010.' And the market believed them — 2-year government bond yields dropped by about 50 basis points in the days after. That's the power of a clear commitment. Luna: But there's always the 'conditional' part. Canada's economy recovered faster than expected. Inflation popped. They had to abandon the date before it arrived — 2010, they started hiking early. Lucas: And that's exactly the risk. If you promise dates and then break them, you lose credibility. So central banks evolved from 'calendar-based' guidance to 'threshold-based' guidance. The Fed under Ben Bernanke in December 2012 said 'rates will stay near zero as long as unemployment is above 6.5 percent and inflation stays low.' That's a data-driven promise. Luna: The 6.5 percent threshold was a very specific number. Did it work? Lucas: Initially, yes. Markets anchored expectations. The yield curve flattened because investors believed the Fed wouldn't hike until unemployment hit that number. But there's a catch — unemployment fell faster than expected. By late 2013, it was approaching 6.5 percent. And the Fed started talking about 'tapering' asset purchases, which confused markets. The threshold became a self-defeating prophecy. Luna: So the guidance itself accelerated the timeline? The Fed believed its own guidance, but the economy moved faster, and then they had to change the conversation. Lucas: Right. That's what economists call the 'guidance trap.' You set a threshold, the market expects you to stick to it, but if conditions improve, you either break your promise or keep rates too low and risk inflation. The Fed eventually dropped the unemployment threshold in 2014 and moved to 'qualitative' guidance — we'll be patient, we'll assess incoming data. Luna: Let's jump to a more recent example — the Reserve Bank of New Zealand in 2020. They went beyond thresholds and actually published an entire yield curve target. They said the one-year government bond yield should stay at 0.25 percent. Lucas: That was a fascinating experiment. The RBNZ explicitly said 'we will buy any amount of short-term government bonds necessary to keep the one-year yield at 0.25 percent.' It's not just guidance — it's a price anchor with a backstop. And it worked for a while. The one-year yield sat right at 0.25 in 2020 and early 2021. But by 2022, with inflation surging, they had to abandon it. And abandoning a hard yield target is messy — yields jumped 100 basis points in a week. Luna: Because the market had anchored on that number for almost two years. The credibility loss when you break such a specific target is enormous. Lucas: And that's the tension. Forward guidance only works when it's credible. But to be credible, it has to be specific — and specificity means you can be wrong. Central banks have to balance between being understood and being locked in. Luna: There's also a distinction I've seen economists make — between 'Delphic' and 'Odyssean' forward guidance. Delphic is just a forecast: 'here's what we think will happen.' Odyssean is a binding commitment: 'we will tie ourselves to the mast to prove we won't change course.' Lucas: Great distinction. Delphic guidance is basically a more formal version of 'the dots' — the Fed's rate projections. It's non-binding. Odyssean guidance is when a central bank actually constrains its future actions — like the RBNZ yield target or the Bank of Canada's conditional commitment. And history shows Odyssean guidance is more powerful but also more dangerous. Luna: Let's look at an example of Delphic guidance that went wrong — the European Central Bank in 2019. They said rates would stay at current or lower levels 'through the end of 2019, and in any case for as long as necessary.' That's a mix of calendar and qualitative. But by late 2022, rates were being hiked aggressively. Lucas: The ECB's 'through the end of 2019' language was actually calendar-based, which made it closer to Odyssean in effect. But the key issue is that all forward guidance suffers from what we might call the 'Mario Draghi problem' — the famous 'whatever it takes' speech in 2012 was powerful because it was vague and unconditional. It didn't set a date or a number. It just signaled determination. Sometimes less specificity gives you more credibility. Luna: So there's a trade-off. Vague guidance gives you flexibility but may not move markets much. Specific guidance moves markets but you risk breaking your promise. Lucas: Exactly. And that's why forward guidance has become more cautious post-pandemic. The Fed now uses something called 'outcome-based forward guidance' — they say things like 'the committee expects it will be appropriate to maintain the target range until inflation is on track to moderate.' It's flexible. But some economists argue it's too flexible to actually anchor expectations. Luna: This is one of those topics where if you've found today's breakdown useful, it actually helps us keep making these episodes. The show stays ad-free because listeners who find value chip in — you can do that at buy me a coffee dot com slash fexingo. No pressure, just if it clicks. Lucas: Honestly, the economics behind forward guidance is dense, but when it works, it's one of the most elegant tools central banks have. And we love unpacking that for you. So thanks for being part of it. Luna: Back to the substance — one thing that's changed is the use of forward guidance in emerging economies. The Bank of Korea and the Reserve Bank of India have both tried forms of it. Did they have success? Lucas: Mixed. The Bank of Korea used very simple 'data-dependent' guidance in 2021 — saying they'd hike if growth stayed strong. That worked because it was vague enough. But the Reserve Bank of India in 2019 issued a 'whatever it takes' style statement to reassure markets after a liquidity crisis, and it calmed things down. Generally, emerging markets need more flexibility because external shocks — like currency moves — can overwhelm domestic conditions. Luna: Also, credibility is harder to earn when your central bank has a history of missed inflation targets. If the bank says 'we'll keep rates low until inflation is 4 percent,' but inflation has averaged 6 percent for the past five years, markets won't buy it. Lucas: That's the core insight. Forward guidance is only as good as the track record behind it. The Fed, the Bank of England, the RBNZ — they all built credibility over decades. And even they struggle when the economy surprises them. The Bank of Japan has used forward guidance for years — explicit dates, yield curve control — but deflationary expectations are so entrenched that guidance hasn't been enough to lift inflation persistently. Luna: The Bank of Japan is a case study in limits. They've been doing forward guidance since 2016 with yield curve control. They set a 10-year yield target at zero percent. And they've had to defend that target by buying massive amounts of bonds. The guidance becomes a commitment that forces them to expand their balance sheet without end. Lucas: Right. That's the 'guidance trap' taken to an extreme. You set a target, the market tests it, you defend it, and the defense itself becomes the policy. The BOJ now owns over 50 percent of Japanese government bonds. Their forward guidance effectively became a quantitative easing program. So guidance doesn't operate in isolation — it's intertwined with the tools you're willing to use. Luna: Let's talk about the future. Central banks are now thinking about how to integrate forward guidance with digital currencies or real-time data. If you can see economic activity more quickly, can you issue guidance that updates automatically? Lucas: That's a fascinating frontier. Imagine a central bank saying 'the policy rate will be set by a rule based on real-time inflation and unemployment data — and we pre-commit to that rule.' That's essentially a 'Taylor rule' with teeth. Some economists call it 'rules-based forward guidance.' It would reduce discretion but increase credibility. But it also reduces flexibility to respond to rare events — like a pandemic. Luna: And no one wants central banks to be robots, right? The beauty of human judgment is that you can adapt. But the problem is, adaptation looks like flip-flopping. Lucas: That's the paradox. Forward guidance is a communication tool designed to make central banks more predictable. But the economy is inherently unpredictable. So the more specific the guidance, the more likely you are to need to revise it. And every revision chips away at credibility. The best practitioners — like Carney or Bernanke — understood that guidance is a conversation with markets, not a contract. Luna: So final question — given all these failures and risks, is forward guidance still worth doing? Or should central banks go back to just setting rates and saying very little? Lucas: I think it's absolutely worth doing, but with more humility. The worst outcome is not a failed guidance — it's a silent central bank that surprises markets. Surprise is the enemy of stability. So even if guidance is imperfect, giving markets a sense of your reaction function — how you interpret data — is valuable. The key is to frame it as a conditional plan, not a promise. Luna: That's the shift we've seen post-2022. The Fed's language now includes phrases like 'the committee judges that the risks are roughly balanced.' It's intentional vagueness. Lucas: Exactly. They've learned that specificity can be a trap. So they give you the dots, but they also emphasize uncertainty. I think the honest take is: forward guidance is a powerful tool in a central bank's kit, but it's not a magic wand. It works best when it's backed by a consistent framework and a willingness to be wrong. And on that note, maybe the best guidance is the one you don't have to break.