Latest / The Federal Reserve Podcast with Fexingo: Interest Rates, FOMC Meetings, and Monetary Policy / The Fed's New Tool for Controlling Money Market Rates
Transcript
- Lucas: So, Luna, there's this tool at the Fed that rarely gets headlines, but it's quietly become the centerpiece of how they control short-term rates. I'm talking about the overnight reverse repurchase agreement facility — the reverse repo, for short. Luna: Right, the one that sounds like something out of a mortgage-backed securities manual. But I've seen the numbers — it's been absorbing hundreds of billions of dollars. What exactly is it doing? Lucas: So the reverse repo is essentially a parking lot for cash. The Fed borrows money overnight from money market funds and other eligible firms, and in exchange, it gives them Treasuries as collateral. The rate on that is effectively a floor under short-term rates — it's the Fed saying, 'We'll pay you this rate to park cash with us overnight, so why would you lend below that?' Luna: So it's a price floor. Like the Fed setting a minimum wage for money market rates. Lucas: Exactly. And it's been the main mechanism for keeping the fed funds rate in its target range since the great financial crisis, but it's become even more critical in recent years. In July, the effective fed funds rate was 3.63 percent, and the interest on reserve balances was 3.65 percent. The reverse repo rate is set a little below that, around 3.60, so it anchors the bottom. Luna: And why is that anchor so important? I mean, the Fed could just rely on interest on reserves, right? Lucas: You'd think so, but interest on reserves only applies to banks. Money market funds aren't banks. They can't earn that rate. So without the reverse repo, they'd be pushing cash into Treasury bills or other instruments, which could drag rates below where the Fed wants them. The reverse repo gives them a risk-free place to park, so the Fed keeps control. Luna: Got it. And we're seeing this in action right now, with all the liquidity that's still sloshing around from the pandemic-era balance sheet. Even with quantitative tightening, the reverse repo usage has been massive. Lucas: Right. And it's tapered a bit as the Fed has let its balance sheet run off, but it's still in the hundreds of billions. The point is, the reverse repo is the workhorse. And it's interesting because a lot of the conversation around the Fed's tools focuses on the funds rate target, but the operational details matter just as much. Luna: So when the FOMC sets a target range, say 3.50 to 3.75, the reverse repo is what makes the lower bound stick? Is that the idea? Lucas: Exactly. And then the upper bound is enforced by interest on reserve balances, because banks won't lend below that if they can just park excess reserves at the Fed. So you have this two-sided floor and ceiling. It's elegant in theory, but the mechanics can get messy, especially when there's a lot of liquidity. Luna: And what happens when the reverse repo starts to decline? We've seen that trend over the past year or so. Does that signal something about the economy? Lucas: It's more about liquidity conditions than the economy. When reverse repo usage falls, it often means money market funds are finding better opportunities elsewhere — like in Treasury bills — which can happen when the Fed is letting its balance sheet run off and the Treasury is issuing more bills. So it's a technical signal, not a macroeconomic one. Luna: But it's still a good indicator of how the Fed's balance sheet normalization is going. I remember in 2023, there was a lot of worry about reserves getting scarce, but the reverse repo buffer kind of absorbed that. Lucas: Exactly. It's like a shock absorber. As long as there's that pile of cash in reverse repo, the Fed can keep shrinking its balance sheet without draining reserves from the banking system. That's why they've been so patient with QT. They're watching reverse repo usage as a gauge of when to stop. Luna: So if reverse repo goes to near zero, that's a red flag that reserves are getting scarce and QT should pause. Have we seen that yet? Lucas: Not yet. We're still averaging over two hundred billion in reverse repo, so there's a cushion. But it's something they're watching closely, especially with the debt ceiling drama earlier this year and the Treasury's cash management. Luna: Right, and that's a good point about the plumbing. It's easy to focus on the headline rate decisions, but the actual implementation is where the rubber meets the road. Lucas: And speaking of the road, let's look at the latest inflation data, because it ties into why the Fed is still in this holding pattern. The July CPI came in flat on a headline basis, but core was up a touch. And the ten-year breakeven — which is a market-based measure of inflation expectations — ticked up to 2.27 percent, from 2.24. That's still within a 'normal' range, but it's a reminder that the market sees some stickiness. Luna: So inflation expectations are stable, but not necessarily falling. And the Fed's been pretty clear they want to see more progress before cutting rates. Lucas: Right. And with the effective fed funds rate at 3.63, and the Fed's target range at 3.50 to 3.75, they're right in the middle. The market is pricing in maybe one or two cuts by year-end, but the Fed has been careful not to commit. Luna: So the reverse repo is doing its job, keeping rates where the Fed wants them, while the Fed waits for clearer signals on inflation. Lucas: Exactly. And you know, it's funny — we talk about the Fed's tools in the abstract, but this is one that actually works. It's not flashy, but it's essential. And for listeners who want to understand the Fed's next move, watching the reverse repo and the breakevens is probably more useful than reading every FOMC statement. Luna: Yeah. And that kind of clarity is why I'm glad we do this show. Speaking of which, we like to keep this podcast free and independent, and that's only possible because of listeners who chip in. If you find these deep dives helpful, and if today's episode was worth a coffee to you, there's a link — buy me a coffee dot com slash fexingo. That's the whole ask. Lucas: And it genuinely helps us keep doing this. No ads, no sponsors, just the two of us and the data. So if that's something you value, we appreciate it. Luna: Alright, back to the plumbing. We talked about how the reverse repo floor works, but what's the actual takeaway for someone watching the Fed? What should they look for in the coming months? Lucas: I'd say two things. First, watch the reverse repo volume. If it starts declining rapidly, that could indicate reserves are getting tight, which might push the Fed to slow QT sooner. Second, watch the ten-year breakeven. If it stays around 2.25 to 2.3 percent, the Fed can be patient. If it starts drifting above 2.5, you'll see them get more concerned. Luna: So it's not just about the next CPI print, but about these underlying liquidity and expectation measures. Lucas: Exactly. And that's the kind of nuance that gets lost in the headlines. The Fed is managing a complex system, and the reverse repo is one of the levers they pull every single day.