Latest / Monetary Policy Explained with Fexingo: Central Banks, Money Supply, and Interest Rates / The Hidden Tax of Central Bank Reserves
Transcript
- Lucas: We’ve spent the last few weeks talking about the central bank balance sheet as if it were a static ledger, but the real story in September twenty-twenty-six isn’t just about size—it’s about price. The Federal Reserve has been paying interest on reserves at four point five percent, and while that sounds like good news for banks, it’s actually creating a quiet friction in the credit markets that most consumers never notice. Luna: Right, because if I’m a bank CEO, why lend to a small business at seven percent when I can park my cash with the Fed at four and a half percent with zero risk? It seems like a rational choice until you realize the economy stops getting fuel. Lucas: Exactly. That’s the core tension. When the interest on reserves rate, or IOR, is high relative to other safe yields, banks become hoarders of liquidity rather than distributors of capital. We saw this clearly in the third quarter reports from major players like JPMorgan Chase and Goldman Sachs. Their net interest margins didn’t collapse; they just shifted entirely away from active lending toward passive treasury holdings. Luna: So the money isn’t disappearing, it’s just sitting in a vault that only the Fed can open, waiting for a better deal. Is this happening everywhere or just with the big banks? Lucas: It’s systemic, but it hits regional banks harder. Let’s look at a mid-sized lender in the Midwest. They used to make money by taking deposits at one percent and lending them out at six percent. Now, they’re offering two percent on savings accounts to keep customers from fleeing to money market funds, but they’re also charging themselves nearly five percent to hold those same dollars at the Fed. The spread is gone. So they stop making new loans. Luna: That’s a terrible incentive structure. You’re basically taxing the act of intermediation. If the central bank makes it too profitable to do nothing, why would anyone take the risk of doing something? Lucas: Precisely. And this brings us to the specific number that matters today: the spread between the interest on reserves and the average yield on newly originated commercial loans. In early twenty-twenty-four, that spread was negative, meaning banks lost money on reserves compared to loans. Today, in late September twenty-twenty-six, that spread is positive by roughly one hundred and fifty basis points. That’s a massive structural shift. Luna: One hundred and fifty basis points is enough to convince any risk-averse CFO to hit the brakes on expansion. But does this actually slow down the broader economy, or is it just an accounting quirk? Lucas: It’s not a quirk; it’s a brake. When banks tighten their lending standards, which they have according to the latest Senior Loan Officer Opinion Survey, consumer credit card approvals drop, auto loans get stricter, and small business lines of credit dry up. We’re seeing a twenty percent year-over-year decline in new commercial real estate financing in cities that rely heavily on regional bank funding. Luna: So the Fed thinks they’re managing inflation by keeping rates high, but they’re accidentally strangling the supply side of the economy through their own payment mechanism. That’s a subtle but dangerous feedback loop. Lucas: And here’s the tricky part for listeners to grasp: the Fed doesn’t see this as a bug. They view the interest on reserves as the primary tool for controlling the federal funds rate. If they cut IOR, the federal funds rate might drift lower, but they worry about reigniting inflationary pressures. So they’re stuck in a bind where lowering rates to help lenders hurts their inflation fight. Luna: It feels like they’re choosing the lesser of two evils. But who pays the price for that hesitation? Is it the borrower or the saver? Lucas: It’s both, but in different ways. Savers benefit from higher deposit rates, yes, but those rates are capped by the bank’s ability to profit. Borrowers face a dual penalty: higher base rates and tighter access to credit. You can have the right rate, but if no one will hand you the check, the rate doesn’t matter. We saw this play out last week with a major tech startup in Austin that had a solid balance sheet but couldn’t secure a bridge loan because three regional banks all said their liquidity ratios were too tight. Luna: That’s a concrete example. A company with revenue and assets, still turned away because the bank is playing it safe with the Fed. It changes how entrepreneurs plan their cash flow entirely. Lucas: It forces them to seek alternative financing, which is often more expensive or dilutive. Private credit funds are stepping in, but they charge eight or nine percent, not the six percent you’d expect in a normal cycle. So the cost of capital for innovation is rising, not falling, even though headline inflation is cooling. Luna: I want to pause here for a second because this kind of deep dive into how money actually moves—rather than just what the headlines say—is exactly why we built this network. If walking through the economy with us has made something click, or helped you understand the hidden layers of finance that others ignore, we’d love your support. It’s listener contributions that keep these episodes ad-free and allow us to spend the time digging into the details like this. You can find us at buy me a coffee dot com slash fexingo. Any amount helps keep the lights on and the research rigorous. Lucas: Thanks, Luna. And back to that private credit point—because it highlights another distortion. When traditional banks step back, non-bank lenders fill the void, but they don’t have the same regulatory constraints. This means risk is moving from the regulated sector to the unregulated sector, which could create fragility elsewhere in the system. Luna: So we’re solving one problem by creating another. The shadow banking sector gets bigger, less transparent, and potentially more volatile. Does the Fed monitor that shift closely? Lucas: They do, but their tools are blunt. The Fed can adjust the discount window or tweak reserve requirements, but those are nuclear options. For now, they’re relying on the assumption that the private credit market is diversified enough to absorb shocks. But if a recession hits and loan defaults rise, those non-bank lenders don’t have deposit insurance or federal backstops. They’ll need cash fast, and the banks they rely on for funding are currently hoarding reserves. Luna: That sounds like a classic liquidity crunch waiting to happen. The banks have the cash, but they won’t lend it, and the borrowers need it. It’s a gridlock of capital. Lucas: Gridlock is the perfect word. And this brings us to the behavioral aspect. Bank managers are being evaluated on return on equity, but their boards are terrified of asset quality deterioration. So they prioritize safety over yield. It’s a rational corporate response to an irrational macro environment. The signal from the Fed says ‘stay liquid,’ so they stay liquid. Luna: But staying liquid isn’t the same as being healthy for the wider economy. If everyone holds cash under the mattress, the engine stalls. How long can this equilibrium last before someone breaks? Lucas: History suggests it lasts longer than policymakers hope. During the post-2008 era, excess reserves ballooned for nearly a decade before lending picked up significantly. We might be looking at a similar multi-year period where the banking sector acts as a reservoir rather than a river. The water is there, but it’s not flowing downstream. Luna: So investors should watch the flow, not just the stock. Meaning, track the volume of new credit issued, not just the total assets held by banks. That’s the leading indicator. Lucas: Spot on. Look at the weekly data from the Federal Reserve Board on bank credit outstanding. If that line flattens or dips while GDP grows, it means the economy is running on fumes, burning through existing inventory and demand rather than expanding capacity. It’s a sign of exhaustion. Luna: Exhaustion masked by stability. Because the banks aren’t failing, they’re just stagnating. It’s a slow bleed rather than a sudden crash, which makes it harder to diagnose for the average viewer. Lucas: Exactly. And that’s why understanding the interest on reserves mechanic is crucial. It explains why your friend’s small business loan was denied despite good credit scores. It’s not personal; it’s arithmetic. The math of holding reserves simply outweighs the math of lending. Luna: It reframes the whole narrative of credit availability. We usually blame greedy bankers or strict regulators, but sometimes it’s just the central bank’s pricing model creating a disincentive to participate. Lucas: And as we move toward the end of the fiscal year, we’ll likely see increased volatility in short-term funding markets as banks try to optimize their balance sheets for reporting dates. That’s when the hidden stresses in this gridlock tend to surface. Luna: So keep an eye on the overnight repo rates in December. If those spike, it means the banks are finally fighting over the scarce liquidity they’ve been hoarding all year. Lucas: That’s a great watch point. A spike in repo rates would be the market’s way of telling us that the reservoir is leaking. Until then, expect the status quo to persist: high rates, tight credit, and a banking sector that prefers sleep to activity. Luna: It’s a reminder that monetary policy isn’t just about setting a number; it’s about designing incentives that align with the health of the entire system, not just the stability of the banks. Lucas: Agreed. And if the Fed ever decides to lower that interest on reserves below the market rate for safe assets, we might see a sudden rush of lending. But until then, the tap remains off. Luna: So the question for our listeners isn’t just what the Fed is doing, but what the banks are refusing to do in response. What’s the opportunity cost of that refusal? Lucas: And that’s a profound question. Because every dollar not lent today is a factory not built, a job not created, and a product not launched tomorrow. The cost of waiting is measured in lost potential. Luna: A heavy price to pay for stability. But maybe a necessary one if the alternative is chaos. We’ll have to see if the next quarter brings a shift in strategy or more of the same. Lucas: Indeed. As always, keep watching the spreads, not just the headlines. The truth is usually hiding in the details of the balance sheet.