Latest / Monetary Policy Explained with Fexingo: Central Banks, Money Supply, and Interest Rates / Why Central Banks Care About Bank Runs
Transcript
- Lucas: So, Luna, you ever wonder why the Federal Reserve has a literal printing press? Not for money printing in the conspiracy sense—but for the quiet, boring, but absolutely vital job of stopping a bank run. Luna: I mean, I've seen the movies. The line out the door, the panicked faces. But is that actually what it looks like now? Lucas: Not exactly. Modern bank runs are fast and digital. You don't need a line—you just need a few large depositors clicking 'withdraw' on their phones. In March 2023, Silicon Valley Bank lost about forty-two billion dollars in deposits in a single day. That's the speed we're talking about. Luna: Forty-two billion in a day? That's not a run, that's a sprint. What triggers that kind of panic? Lucas: Usually it's a whiff of bad news about the bank's assets. In SVB's case, they'd loaded up on long-term Treasuries that lost value as rates rose. When they had to sell some at a loss, the market did the math and realized that even the bank's uninsured depositors—who had way more than the two-fifty-grand FDIC limit—might be in trouble. Luna: And so those big depositors got spooked and pulled their money. But why don't they stop to think? Wouldn't they know the central bank would step in? Lucas: That's the thing—they knew the Fed could step in, but they weren't sure it would. And when you're a tech startup with a hundred million in the bank, you don't wait to find out. So the run happens before the backstop even gets a chance to work. Luna: So what's the central bank's actual job here? Is it to save every bank, or just to keep the system from freezing up? Lucas: Good question. The central bank's job isn't to save a badly managed bank—it's to prevent a panic from turning a solvency problem into a systemic one. That's why the Fed has a variety of tools that go beyond just the interest rate. Luna: Okay, walk me through the toolkit. What have they got besides the printing press metaphor? Lucas: First, there's the discount window. It's a facility where banks can borrow directly from the central bank, usually overnight, at a penalty rate. It's been around for over a century, and it's designed to provide emergency liquidity to a bank that's temporarily short on cash. Luna: But I remember hearing that banks were reluctant to use it during the financial crisis—there was a stigma attached to it. Lucas: Exactly right. If a bank goes to the discount window, the market might think it's in trouble. So the Fed has tried to destigmatize it, but it took a bank run at SVB to get banks to use it willingly. In the days after that, the Fed saw a record spike in discount window borrowing—hundreds of billions. Luna: So the discount window is like the central bank being the lender of last resort. But that's a classic tool. What's newer? Lucas: The big innovation after 2023 was the Bank Term Funding Program. It let banks pledge their bonds at par value, not at the depressed market price. So a bank holding a ninety-cent Treasury could borrow ninety cents' worth, not eighty. That one move eased a lot of pressure. Luna: That's clever—it basically removes the 'fire sale' incentive. But isn't that just a subsidy for banks that made bad bets? Lucas: It's a trade-off. If a bank is fundamentally sound but facing a temporary liquidity crunch because of rising rates, you want to give it a bridge. The alternative is letting it sell assets at a loss, which could tip it into insolvency and cause a bigger panic. The Fed's job is to minimize the spillover to the real economy. Luna: But how does a run on one regional bank spill over to, say, a manufacturing company in Ohio? I get the stock market reaction, but the real economy? Lucas: Because banks are the plumbing. If a bank fails, its borrowers lose access to credit. Small businesses, homebuyers, even municipalities that had their cash in that bank. And if depositors lose confidence in other banks, they start pulling money from those too. That's how a run on one bank becomes a run on the system. Luna: So it's about confidence. But what's the central bank's role in maintaining that confidence when it's not an actual crisis? Like, is there a day-to-day tool? Lucas: That's where the liquidity coverage ratio comes in. It's a regulation that requires big banks to hold enough high-quality liquid assets—like Treasuries—to survive a thirty-day stress scenario. The idea is to make banks buffer themselves so they don't have to rely on the central bank in the first place. Luna: But SVB wasn't a big bank, right? It didn't have to meet that ratio. Lucas: Right, and that's one of the lessons from 2023. The rule applied to banks with over two hundred fifty billion in assets, and SVB was just under that. So it was exempt. Since then, regulators have been looking at how to apply stress tests more broadly, especially to banks with high levels of uninsured deposits. Luna: Uninsured deposits are the fuel for a run. It's like everyone has a match, and the bank has a pile of kindling. Lucas: That's a good way to put it. And central banks are keenly aware of that. So they've also been working on technology—like instant payment systems that could theoretically make runs even faster, but also make it easier to track and respond. Luna: So we're in a weird spot where technology is both a threat and a tool. But what about the average person? Should we be worried about our deposits? Lucas: For most people, no. If you've got less than two hundred fifty thousand in a bank, you're protected by the FDIC. That covers roughly 99 percent of all deposit accounts in the United States. The risk is really concentrated in large, uninsured deposits at smaller banks. Luna: And that's the thing that keeps central bankers up at night. Lucas: It does. Because if a run happens at one bank, it can trigger a contagious fear. That's why they're always rehearsing and planning for that scenario. And the tools they have—the discount window, emergency facilities, and even unconventional moves like the Bank Term Funding Program—are all designed to stop a run before it becomes a stampede. Luna: If today's episode helped you make sense of what central banks actually do, that's exactly why we make this show. And since we keep it ad-free, the way that stays possible is listener support. If you'd like to help, you can buy us a coffee at buy me a coffee dot com slash fexingo. Lucas: Yeah, no pressure. But if you've gotten some clarity on how the financial system works, that's the goal. And the link is in the show notes. Luna: So back to the toolkit—you mentioned the discount window and the emergency facility. What else is in the central bank's playbook that we haven't talked about? Lucas: One more: open market operations. That's when the central bank buys securities to inject liquidity into the system. It's not usually targeted at a specific bank, but it can help calm broader funding markets. And then there's the macroprudential stuff—like stress tests and capital requirements—that try to prevent runs from happening in the first place. Luna: So it's a mix of prevention and response. But is there any way to fully eliminate the risk of a bank run? Lucas: Probably not. As long as there's a fractional reserve system and the ability to withdraw on demand, there's always the potential for a run. But the goal is to make it as boring and unlikely as possible. And that's what central banks have been working on for over a century. Luna: Well, it's certainly less dramatic than the movies. Maybe that's a good thing. Lucas: Absolutely. Boring banking is good banking. And if this episode made you feel a little more confident about the system, then we've done our job.