Latest / Monetary Policy Explained with Fexingo: Central Banks, Money Supply, and Interest Rates / How Central Banks Use Standing Facilities to Control Short-Term Rates
Transcript
- Lucas: So earlier this week, the European Central Bank narrowed the corridor between its deposit rate and its marginal lending rate from 75 basis points to 50. It's one of those technical tweaks that doesn't get much attention, but it actually tells you a lot about how central banks make their policy rate stick. Luna: Right — the corridor. That's the floor and ceiling for overnight rates, set by those two standing facilities. The deposit facility is the floor, the marginal lending facility is the ceiling. Lucas: Exactly. Banks can park excess reserves overnight at the deposit facility and earn that rate — currently 3.25 percent after the June 4 decision. And if they need emergency liquidity, they can borrow from the marginal lending facility at 3.75 percent. So any rational bank will lend in the interbank market only at rates between those two, because why would you lend below the deposit rate or borrow above the lending rate? Luna: But hasn't that whole corridor model broken down since quantitative easing flooded the system with reserves? I mean, in the US, the fed funds rate has been trading right at the interest on reserve balances rate for years — the ceiling and floor almost don't matter anymore. Lucas: That's a great point. In a reserve-abundant system, the corridor does shift. The Fed now uses IORB — interest on reserve balances — as its primary tool to set a floor, and the overnight reverse repo facility as a secondary floor. The discount window is still there as a ceiling, but it rarely gets used. The ECB's corridor still matters more because the euro area has a different structure — there's more interbank lending, and some banks are still reserve-scarce. Luna: So the corridor is more relevant in Europe than in the US right now. But what about the Bank of England? I know they changed their framework after quantitative tightening started reducing reserves. Lucas: The Bank of England is probably the best case study for how standing facilities adapt. They have a standing lending facility and a standing deposit facility, same concept. But during quantitative tightening, as reserves drain, the demand for the lending facility should theoretically increase. In practice, the Bank also offers a weekly index-linked long-term repo, which acts as a kind of insurance. The key number: the Bank sets its bank rate — currently 4.75 percent — and then the lending facility is 25 basis points above that, and the deposit facility is 25 basis points below. That symmetric 50-basis-point corridor is deliberately narrower than what the ECB just shifted from. Luna: And that's designed to keep short-term rates very tight around the policy rate. So if market rates drift away, banks have a clear arbitrage: lend to the central bank at the deposit rate or borrow from it at the lending rate. Lucas: Right. And that's the whole point — standing facilities are the enforcement mechanism for the policy rate. Without them, the central bank's target is just a wish. With them, it's a self-enforcing band. That's why emerging-market central banks often have much wider corridors, because they're dealing with way more volatility in bank reserves and less trust in the banking system. Luna: Can you give an example? I remember the Reserve Bank of India has a marginal standing facility at 100 basis points above the repo rate, and a standing deposit facility at 25 basis points below. Lucas: Exactly. India's corridor is 125 basis points wide — much bigger than the ECB's 50 or the Bank of England's 50. That asymmetry reflects that Indian banks have more volatile liquidity needs, and the central bank wants to discourage excessive reliance on the lending facility by making it more expensive. On the other side, the deposit facility floor is set just a bit below the repo rate, so banks have an incentive to lend in the market rather than just park everything at the RBI. Luna: And then you have central banks that don't even use a corridor — they use a floor system, like the Fed. So there's a spectrum. Lucas: There is a spectrum, and it reflects the central bank's operating framework and the depth of the financial system. The Fed's floor system works because there are trillions of reserves in the system, so the fed funds rate stays glued to IORB. But if the Fed ever lets reserves drain significantly, they might need to widen the corridor or switch to a corridor system again. That's actually one of the quiet debates inside the Fed right now — the long-run operating framework after quantitative tightening. Luna: I want to shift slightly — because this concept of standing facilities isn't just about rates. It's also about stigma, right? The discount window in the US has historically carried a stigma — banks are afraid to use it because it signals weakness. Lucas: Huge issue. The Fed has been trying to destigmatize the discount window for years, especially after the 2008 crisis and again after the regional banking turmoil in 2023. But banks still borrow at the discount window only as a last resort. That's why standing lending facilities in other countries are often designed to be more palatable — the ECB's marginal lending facility, for instance, is just a normal part of daily liquidity management for many eurozone banks. No stigma. Luna: And that's partly because the ECB's facility is a standing facility — always available at a known rate — while the Fed's discount window has historically been more discretionary, with different rates for primary and secondary credit. Lucas: Yes. The Fed's primary credit rate is actually set above the fed funds rate — 50 basis points above, currently — and it's available to sound banks. But the secondary credit rate is higher, for banks that don't qualify for primary. That tiering reinforces the stigma. In contrast, the ECB's marginal lending facility is a one-size-fits-all, no questions asked, as long as you have collateral. Luna: So if you're a small bank in Kansas, you'd think twice before hitting the discount window. But a small bank in Bavaria wouldn't think twice about the ECB's marginal lending facility. Lucas: Precisely. That cultural and operational difference matters. And it's one reason why the Fed has been pushing for more banks to pre-register collateral with the discount window, so that if they ever need it, it's just a click away. But it's still not a standing facility in the same sense — it's not a pure corridor tool. Luna: Well, and this touches on something you wrote about in our prep notes — the Bank of Japan's standing facility is essentially a symmetrical corridor with a deposit rate at minus 0.1 percent and a lending rate at plus 0.1 percent, giving a corridor of just 20 basis points. That's incredibly tight. Lucas: And it reflects the BOJ's obsession with keeping short-term rates exactly where they want them, especially during their yield curve control era. But even now, after the BOJ hiked rates in March 2026 to 0.5 percent, they've kept that narrow corridor. It's a very fine control mechanism. Luna: So the bottom line: standing facilities are the unglamorous backbone of rate targeting. And when a central bank wants to signal a shift in its policy stance, changing the corridor width is one of the most direct ways to do it. Lucas: Exactly. The ECB's June 4 decision to narrow from 75 to 50 basis points is a signal — they want the market to have less wiggle room, to keep overnight rates tighter to the deposit rate. It's a subtle tightening of operational control, even if the policy rate itself didn't move. Luna: You know, conversations like this are exactly why we love doing this show — peeling back the hood on how central banks actually work. And if walking through the economy with us has made something click, we'd love if you considered supporting it. Lucas: Yeah, we keep Fexingo ad-free and accessible, and it's genuinely listener-supported. A couple of dollars a month is what keeps these going — you can find us at buy me a coffee dot com slash fexingo. We really appreciate it. Luna: So back to standing facilities — one thing I didn't mention: the role of collateral. Borrowing from a standing lending facility usually requires high-quality collateral, like government bonds. That's another constraint. Lucas: Absolutely. The ECB accepts a broader range of collateral than the Fed — including some bank loans and asset-backed securities — which makes its facility more accessible. But the collateral requirement is still a buffer, ensuring that only solvent banks with good collateral use the facility. It's a second line of defence. Luna: And in a crisis, central banks often expand what they accept as collateral. During 2020, the Fed expanded to include some corporate bonds and even equities, but only through emergency facilities. Standing facilities don't get that flexibility without a formal change. Lucas: Right. Standing facilities are for normal times. In emergencies, central banks create temporary lending programs with broader collateral. That's actually a good distinction to keep in mind: the standing facility is always there, it's always at a known rate, and it's always the same scope. Emergency facilities are ad hoc. Luna: So as we wrap up, what's the one takeaway you'd want listeners to remember about standing facilities? Lucas: That a central bank's policy rate is only as credible as the facilities that enforce it. The corridor — the distance between the deposit rate floor and the lending rate ceiling — is the mechanism. And the width of that corridor, the stigma attached to using it, and the collateral rules all shape how effectively the central bank can control short-term rates. Luna: And next time the ECB or the Fed tweaks its standing facility rates or corridor width, you'll know exactly what it means. Lucas: Exactly. For Fexingo's Monetary Policy Explained, I'm Lucas. Luna: And I'm Luna. See you next episode.