Latest / Monetary Policy Explained with Fexingo: Central Banks, Money Supply, and Interest Rates / Why Your Bank Account Grows When Rates Rise
Transcript
- Lucas: We need to stop telling people that central banks print money to pay off debt or stimulate spending directly. That narrative is dead, and it’s been dead since the twenty tens, yet you hear it everywhere. The real story isn’t about printing presses; it’s about pricing power. Specifically, how the Federal Reserve changed the game by starting to pay interest on the reserves that commercial banks hold with them. Luna: Right, so instead of forcing banks to lend out every extra dollar they get, the Fed just pays them to keep it there? That feels like a massive shift in leverage. Lucas: Exactly. Before two thousand and twelve, banks were legally required to hold a small fraction of deposits as reserves and couldn’t earn any interest on them. So if they got an influx of cash, they had to lend it out to make money. But when the crisis hit and the Fed started buying assets, those reserves ballooned. To prevent a credit explosion, they started paying banks to sit on that cash. It was a brilliant way to absorb liquidity without triggering hyper-lending. Luna: So the money supply didn’t grow because the banks just chose to be safer? That sounds like a very rational business decision, but does it actually slow down the economy? Lucas: It slows down the velocity of money, which is effectively the same thing in macro terms. When banks earn a risk-free return on reserves via the Interest on Reserve Balances rate, they have no incentive to take on the risk of lending to smaller businesses or consumers. They just park the money at the Fed. This breaks the old money multiplier theory where one dollar of reserves theoretically created ten dollars of loans. That link is severed now. Luna: Which means the traditional view that increasing the monetary base causes inflation is completely wrong in this environment? Lucas: Spot on. We saw the monetary base triple during the pandemic, and yet we didn’t see the kind of M1 velocity spike that would suggest immediate hyperinflation. Why? Because that base money stayed at the top of the pyramid. It didn’t trickle down into wages or consumer spending because the gatekeepers, the big banks, were happy to hold it as interest-bearing assets. It’s less about the quantity of money and more about the price of holding it. Luna: That’s a fascinating distinction. So the lever isn’t the amount of money available, it’s the cost of borrowing versus the reward for sitting still. Lucas: Precisely. And this brings us to the current tension in October twenty twenty-six. The Fed is trying to manage this equilibrium while keeping inflation anchored near two percent. If they raise rates too high, they attract even more reserves, further choking off credit growth. If they keep them low, they risk reigniting speculative lending. It’s a tightrope walk that requires precise calibration rather than brute force. Luna: But doesn’t this create a weird dependency? Like, banks are basically getting paid by the government to hoard cash instead of helping the actual economy grow? Lucas: That’s the critical question. It’s not hoarding in the predatory sense; it’s liquidity management. Banks need these reserves to meet payment obligations and regulatory requirements. By paying them, the Fed ensures the banking system remains stable. But yes, it does mean that monetary policy works more indirectly now. It’s less about flooding the market with cheap capital and more about setting the floor for all other interest rates. Luna: So when we hear about the federal funds rate target, we’re really hearing about the price of safety? Lucas: Yes. The federal funds rate is essentially the benchmark for overnight lending between banks. By aligning the Interest on Reserve Balances closely with that target, the Fed ensures that banks won’t lend below that rate, nor park their money above it. It creates a corridor. Everything else, from mortgage rates to corporate bonds, floats relative to that corridor. It’s a sophisticated plumbing system that most people don’t realize is running underneath every transaction they make. Luna: I wonder if this makes monetary policy less transparent? If the mechanism is this hidden, how do regular investors know what’s happening? Lucas: It does obscure the signal. In the past, you could look at the growth of M2 money supply and guess where inflation was heading. Now, M2 can grow or shrink based entirely on whether banks prefer lending or holding reserves, regardless of underlying economic demand. We have to look at broader indicators like credit spreads and yield curves to understand the true state of financial conditions. The raw money data is no longer the north star it used to be. Luna: That’s scary. If the standard metrics are broken, aren’t we flying blind a bit more than we think? Lucas: Not blind, just needing better instruments. Think of it like moving from checking the fuel gauge to reading the engine’s telemetry. You need more data points. For instance, watching the spread between Treasury yields and corporate bond yields tells you how much risk the market is demanding. If that spread widens, it means banks are tightening standards, even if reserves are abundant. It’s a sign of fear, not scarcity. Luna: So abundance of reserves doesn’t guarantee lending if fear is high. That seems counterintuitive but makes perfect sense. Lucas: It does. And this dynamic explains why we’ve seen periods of stagnant GDP despite massive balance sheet expansions. The money exists, but it’s stuck in the vaults of the largest institutions because the risk-reward calculation favors safety over growth. This is why fiscal policy becomes so crucial right now. Monetary policy can set the price of money, but it can’t force the willingness to spend it. Luna: Which brings up the political side. If the central bank can’t stimulate growth on its own, doesn’t that put pressure on Congress to spend? Lucas: Absolutely. It shifts the burden of stimulus onto the legislative branch. When monetary policy is constrained by the need to control inflation and maintain banking stability, fiscal deficits become the primary driver of aggregate demand. This is why we see such intense political battles over government spending. It’s no longer just about social programs; it’s about whether the government needs to step in because the private sector has chosen to lock the gates. Luna: That recontextualizes everything I’ve been reading about government debt. It’s not just a liability; it’s a substitute for missing private investment. Lucas: Exactly. And that’s a dangerous place to be if the cost of servicing that debt rises too quickly. Which ties back to our opening point about interest rates. The Fed is trying to keep rates high enough to cool demand, but low enough to avoid crashing the debt markets. It’s a balancing act that requires immense precision. Luna: Do you think they’ll succeed, or is the system too fragile to handle higher rates for long? Lucas: The system has shown surprising resilience, but fragility accumulates silently. Every year of low rates allowed companies to refinance debt easily. Now, with higher rates, refinancing becomes expensive. We might see a wave of defaults among highly leveraged firms that looked fine five years ago. The Fed knows this, which is why they move cautiously. They are testing the waters, not diving in headfirst. Luna: It feels like we’re living through a fundamental rewrite of the rules. What was true in the nineties doesn’t apply today. Lucas: It’s a new paradigm. We moved from a world of scarce reserves to one of excess reserves. The challenge now isn’t creating liquidity; it’s preventing it from becoming toxic to growth. Central banks have become managers of a surplus, which is a unique problem in economic history. Most policymakers in the last century worried about deflation or credit crunches. Now they worry about the paralysis of plenty. Luna: Paralysis of plenty. I like that phrase. It captures the feeling of having all this money but nothing moving. Lucas: And that movement is what drives employment and innovation. If the money stays parked, the economy stagnates. So the real test for the Fed isn’t just inflation numbers; it’s whether they can find a rate that encourages some risk-taking without igniting a fire. It’s a needle thread that gets harder every quarter. Luna: Given how complex this is, do you think average investors should even try to time their moves based on Fed announcements anymore? Lucas: Probably not in the short term. The signals are too noisy. Instead, focus on your own exposure to interest rate sensitivity. If you have floating-rate debt, watch the prime rate. If you hold long-term bonds, watch the yield curve. Understand your own position relative to the corridor the Fed is setting. Don’t try to predict the central bank; prepare for the environment they create. Luna: Practical advice. Know your own house before you try to read the weather map. Lucas: Exactly. And speaking of knowing your own house, if walking through the economy with us has made something click, consider supporting the show directly. A handful of listeners chip in monthly through buy me a coffee dot com slash fexingo, and that's literally what funds making this many of these shows without ads. It keeps us independent and focused on the details that matter. Luna: Yeah, it’s just a small group keeping the lights on, so if you value this deep dive, checking out that link helps us keep digging into the stuff others ignore. Lucas: Thanks for that support. It really allows us to spend the time needed to untangle these complex mechanisms for you. Luna: Back to the topic though, because I’m still curious about the global side. Does this reserve dynamics play out differently in Europe or Japan? Lucas: It does, and significantly. The European Central Bank operates in a fragmented banking zone, so their transmission mechanism is weaker. They struggle more to get liquidity flowing across borders. Japan has taken this even further with negative rates and massive asset purchases, essentially nationalizing the yield curve. But the core principle remains: paying for reserves changes the incentive structure for banks worldwide. Luna: So it’s a global shift in banking psychology, not just an American experiment? Lucas: It is. Once the major central banks adopted this framework, it became the new normal. Banks everywhere recalibrated their risk models to treat central bank reserves as a primary asset class. It’s a structural change that will likely define finance for the next decade. We are no longer in the era of the money multiplier; we are in the era of the liquidity premium. Luna: A liquidity premium. That’s the term I’ll be remembering. Thanks for breaking that down, Lucas. Lucas: Anytime. Let’s leave you with this thought: in a world where money is plentiful but movement is priced, the biggest advantage you can have is patience and clarity on where that movement is actually going.