ECON – Monetary Policy

Welcome to the Deep Dive. Today, we're going to get into monetary policy. That's right. Our mission here is really to break down these core ideas for you, especially if you're working through the CFA level eye material. Exactly. We want to give you a clear kind of engaging overview, help you review and really master these concepts without getting bogged down in textbook specifics. No figures, no exhibits, just the ideas. Just the core concepts. We'll look at what central banks actually do. They're main goals and the tools they use to influence the economy. Okay, let's dive right in then. Central banks wear a lot of hats, don't they? They certainly do. Maybe start with the basics. They're the ones who issue the currency, right? Fundamentally, yes. They have a mobily unsupplying currency. And that's, you know, a big shift from when money was backed by gold. To today's fiat money system. Exactly. Where its value really rests on, well, trust. Trust in the government. Trust in the bank itself, maintaining that confidence is key. Constantly. And they're also the government's banker and the banker for other banks too. That's right. They handle the government's main accounts and they provide services to commercial banks, sort of the hub of the financial system. Okay. And then there's the whole lender of last resort thing. That sounds important, especially in a crisis. Oh, absolutely crucial. If a bank runs into trouble, the central bank can step in and provide emergency liquidity. This helps prevent bank runs, you know, where everyone tries to pull their money out at once. Like a safety net. A vital one. Deposit insurance helps too. But the central bank's role here is fundamental for stability. Got it. And they oversee payments too. Like how money moves around. Yes. Regulating and supervising the payment systems. Think about all the transactions happening every minute. You need robust, standardized ways for that to happen smoothly. Makes sense. Billions moving constantly. And often internationally. So coordination is important there too. What about gold reserves? They still manage those, even without the gold standard. They do. They manage foreign currency and gold reserves. Large sales of gold, for instance, could still, you know, potentially move markets. Interesting. Okay. And then the big one, the one that gets the headlines. Conducting monetary policy. Right. It's definitely their highest profile role, using their tools to manage the economy. Though just a note, not all central banks supervise the actual banking system itself, right? If sometimes that's a separate body. That's a very good point. Sometimes regulation is handled elsewhere. But conducting monetary policy is pretty much universal for a central bank. So what's the main goal of all this monetary policy stuff? What are they trying to achieve? Well, the primary objective for most central banks around the world boils down to one thing. Price stability. Controlling inflation. Exactly. Keeping inflation low, stable and predictable. That's generally seen as the bedrock for sustainable economic growth. But sometimes you hear about other goals too, don't you? Like jobs or growth or financial stability. You do. Mandate can vary. Some central banks have explicit goals around, say, full employment or overall economic welfare, alongside price stability. Think of the US Fed, for example. Others, like the European Central Bank, have price stability as the clear primary objective. But even where the mandate is broader. Price stability is still central. It's almost always a core, if not the core objective. There's a broad consensus that you can't really have sustainable growth or stable employment long term if prices are all over the place. Okay, that makes sense. So if that's the goal, how do they actually do it? What are the main tools in their toolkit? There are essentially three main levers they can pull. The first and maybe most commonly used is open market operations. Okay, what does that involve? It's basically the central bank buying and selling government securities like bonds in the open market with commercial banks. Right. When the central bank buys bonds, it pays for them by crediting the commercial banks reserve account. So it injects money or reserves into the banking system. Increasing the bank's ability to lend? Generally, yes. And when it sells bonds, it takes money out of the system, producing reserves. So they can influence bank lending capacity or target specific interest rate levels this way. Adjusting the taps, basically. What's tool number two? The second is the central bank's policy rate. This is the official interest rate they set. It's often the rate at which commercial banks can borrow directly from the central bank, maybe overnight. And this rate has different names and different places? It does. You might hear it called the repo rate, the refinancing rate, the discount rate, the federal funds rate target depends on the country. But the principle is the same. Okay. Changing this official rate sends a powerful signal. It influences other short term rates throughout the money markets and eventually feeds through to longer term rates and the rates banks charge customers. So if they raise this policy rate, borrowing generally becomes more expensive across the economy. That's the idea. Yes. It tightens financial conditions. Commercial banks often base their own lending rates, their base rates on this policy rate. And the third tool you mentioned three. The third one is reserve requirements. Oh, right. Forcing banks to hold a certain amount back. Exactly. It's the fraction of deposits that banks are legally required to hold and reserve, either as cash in their vaults or in their account at the central bank. And changing that affects how much they can lend out. Directly, if you raise the reserve requirement, banks have less money available to lend out from each deposit, which restricts money creation. Lowering it does the opposite. Sounds powerful. It is, but it's a bit of a blunt instrument. Hmm. Changing reserve requirements frequently can be quite disruptive to banks planning and operations. So it's not used as much, maybe less so in many developed economies these days. They tend to rely more on open market operations and the policy rate. But it can still be an important tool, especially in some emerging markets. Okay. So those are the tools. But how does flicking one of those switches, like changing the policy rate actually ripple through the whole economy to affect things like inflation or growth? What's the connection? Ah, that's the monetary transmission mechanism. It's not just one direct link, but a whole series of interconnected channels. So the first and most direct impact of changing the policy rate is on other short term interest rates. Money market rates adjust pretty quickly. Right. The cost of short term borrowing. Yes. And that then influences the rates that matter for households and businesses. Things like mortgage rates, car loans, interest rates on business loans for investment, higher rates mean higher borrowing costs. Which tends to dampen spending and investment. People borrow less, companies invest less. Precisely. But that's just one channel. Changes in interest rates also affect asset prices. How so? Well, think about bonds. If interest rates go up, newly issued bonds offer higher yields, making existing bonds with lower coupons less attractive, so their prices tend to fall. I see. Similarly, for stocks or capital projects, the discount rate used to value future earnings or cash flows goes up when interest rates rise. That can lower the present value, potentially making investment seem less appealing. Okay. So borrowing costs and asset values. What else? The exchange rate is another key channel. Ah, right. International effects. If a country raises its interest rates relative to other countries, it can attract foreign capital looking for higher returns. Investors buy the currency to invest. Exactly. That increased demand for the domestic currency tends to make it appreciate, gets stronger. And a stronger currency makes exports more expensive for foreigners. And imports cheaper for domestic consumers. Yeah. So that can dampen net exports, reducing aggregate demand, but also potentially lower inflation through cheaper imports. It's complicated. So many moving parts. It really is. And there's one more crucial element. Expectations. What people think will happen? Precisely. The central banks actions and importantly, how they communicate their intentions, shave expectations about the future path of interest rates and the economy. So if people expect rates to stay high, they might postpone borrowing or big purchases. Yes. Or if they expect rates to fall, they might bring spending forward. These expectations influence consumption, investment, borrowing, even asset prices today. It's about how economic agents, businesses, consumers, anticipate the future based on the central bank's signals. Wow. Okay. So all these channels, short-term rates, asset prices, exchange rates, expectations, they all work together. They interact to influence overall domestic demand and net external demand. And that ultimately puts upward or downward pressure on inflation. So complex process with time lags involved to policy changes don't affect the economy instantly. Right. Takes time to filter through. Now, shifting gears slightly, how do central banks actually decide what policy to set? You mentioned inflation targeting earlier. That seems pretty common now. It is. There's been a real convergence towards inflation targeting over the past few decades. It's seen as a credible way to anchor inflation expectations and maintain that crucial price stability. New Zealand was a pioneer, weren't they? They were, yes. And many others followed. The basic idea is the central bank publicly announces an explicit target, or maybe a target range for inflation. Like 2% or something? Often around 2% for consumer price inflation in many developed economies, yes. And then they commit to using their policy tools to steer inflation towards that target over the medium term. Make sense. What makes it work? What are the key ingredients for successful inflation targeting? Well, there are generally three things considered essential. First, central bank independence. Meaning they can make decisions without political meddling? Broadly, yes. They need operational independence, at least the freedom to set the policy rate as they see fit to achieve the target, even if the target itself is sometimes set by the government. Why is that independent so important? The thinking is that politicians might be tempted to push for, say, lower interest rates. before an election, even if it risks higher inflation later on. Independence helps shield monetary policy from those short-term political pressures, allowing it to focus on long-term price stability. Okay. Independence first. What's second? Second is credibility. The public in the markets have to actually believe that the central bank is both willing and able to hit its inflation target. Trust again. Absolutely. If the central bank says the target is 2%, but everyone expects inflation to be 4%, they don't trust the bank's commitment, then wage demands and price setting might reflect that 4% expectation. Making it harder to actually get inflation down to 2%. Exactly. Credibility helps anchor those inflation expectations. If people believe the target will be met, their behavior helps make it a reality. It's somewhat self-fulfilling. That's why central banks work hard to build and maintain that trust. Credibility. Got it. And the third thing. Transparency. Open about what they're doing and why. Yes. Inflation targeting central banks typically communicate a lot. They publish regular reports, often quarterly, explaining their view of the economy, their inflation forecasts, and the rationale behind their policy decisions. So everyone understands their thinking. Right. They'll explain what data they're looking at, maybe broad money supply, financial market indicators, real economy developments, price trends, and how it feeds into their outlook and policy stance. This transparency builds understanding and reinforces credibility. And why target something like 2% specifically and why not zero or maybe 4%. Good question. Targeting zero sounds simple, but it carries a real risk of slipping into deflation falling prices. Which is bad. Very bad. It can lead people to postpone spending, hoping prices will fall further, and it increases the real burden of debt. So a small positive target like 2% provides a buffer against that deflation risk. Okay. So why not zero? Why not hire like 4%. Because higher inflation, even if stable, starts to erode purchasing power more noticeably and can distort economic decisions. 2% is generally seen as a sort of sweet spot, low enough to be considered effective price stability, but high enough to avoid the deflation trap. And they focus on future inflation, right? Because of those lags you mentioned. Precisely. Policy works with a delay, maybe 12, 24 months, to have its full effect. So they have to be forward looking, setting policy based on where they expect inflation to be, not just where it is today. Okay. That clarifies inflation targeting. But you also mentioned exchange rate targeting. How does that work? Right. That's another approach often used by developing economies. Instead of targeting inflation directly, they target the value of their currency against the major international currency like the US dollar or the euro. They peg their currency. Essentially, yes. They commit to keeping the exchange rate fixed, or maybe within a very narrow band against that anchor currency. How do they manage that? Just declare it. Oh no, they have to actively manage it. They intervene in the foreign exchange market. If their currency starts to weaken below the target, the central bank uses its foreign reserves, say, dollars, to buy up its own currency. Increasing demand for it, pushing the price back up. Exactly. And if their currency gets too strong, they do the opposite, sell their own currency and buy foreign currency. Why would a country choose this? What's the benefit? The main idea is often to import monetary policy, credibility and price stability from the anchor currency country. Import stability. Yes. If you peg your currency to, say, the dollar and the US has low inflation, then your country's inflation rate is likely to converge towards the US rate over time, especially for traded goods. It forces a certain discipline. How does that work if domestic inflation rises? If domestic inflation starts picking up faster than in the US, goods become relatively more expensive. Demand for the domestic currency might fall, putting downward pressure on the exchange rate peg. To defend the peg, the central bank would have to sell foreign reserves and buy domestic currency. Taking domestic money out of circulation. Which tightens monetary conditions, potentially raising interest rates and cooling inflation. So the peg forces monetary policy to adjust to maintain the link. But that sounds like a big trade-off. You lose control over your domestic monetary policy rate. That's the crucial downside. Your interest rates and money supply effectively have to follow whatever is needed to maintain the exchange rate target. They can become much more volatile and might not be appropriate for purely domestic economic conditions. Less flexibility to deal with local recessions or booms. Exactly. And just like with inflation targeting, credibility is vital. If markets start to doubt the central bank's commitment or ability to defend the peg. They might bet against it, speculative attacks. Precisely. Those might dump the currency, forcing the central bank to spend huge amounts of reserves trying to defend it or eventually ban the peg altogether. We've seen major crises triggered this way. Think about sterling back in '92 or the Asian financial crisis later that decade. Big risks. So some countries just give up their currency entirely. Dollarization. Some do, yes. Or create very rigid pegs like currency boards. But exchange rate targeting, while offering potential stability benefits, comes with significant constraints and risks. Okay. So whether targeting inflation or an exchange rate, central banks need to adjust policy. Let's talk about tightening versus loosening, contractionary and expansionary policy. Right. It really comes down to managing liquidity conditions, usually via that policy rate. So if inflation looks like it's going to rise above target. They'd likely implement contractionary policy. That means raising the policy interest rate. Making borrowing more expensive. Reducing liquidity, slowing down borrowing and spending, aiming to cool the economy and bring inflation back down. And the opposite, if the economy is sluggish and inflation is too low. Then they'd use expansionary policy, cutting the policy rate. Make borrowing cheaper. To encourage spending and investment, boost activity and nudge inflation back up towards the target. Pretty straightforward concept. But how do they know how much to raise or cut rates? Is there a baseline? Ah, that's where the idea of a neutral rate of interest comes in. It's a theoretical concept, but an important one. Neutral rate. It's the interest rate level that is neither stimulating nor restricting the economy. It's consistent with the economy growing at its potential rate with stable inflation. So like the Goldilocks rate, not too hot, not too cold. Kind of. Yes. If the policy rate is above this neutral rate, policies considered contractionary or tight. If it's below, it's expansionary or easy. How do they figure out what it is? That's the tricky part. It's not directly observable and it changes over time. It's thought to depend on things like the economy's underlying real trend growth rate and long run inflation expectations. Central banks estimate it, but there's always uncertainty. So it's more of a benchmark for judging the current stance. Exactly. It helps them assess whether they're currently hitting the accelerator, the break, or just cruising. And presumably the reason for inflation matters too. A demand shock versus a supply shock. It's really critical. If inflation is high because everyone's spending like crazy a demand shock, then tightening monetary policy by raising rates is the standard response to cool that demand. Makes sense. But if inflation is high because say global oil prices spiked a supply shock, raising rates might not fix the oil price issue, but it could push an already struggling economy into recession. The response needs to consider the source of the shock. Right. A much tougher balancing act in that case. Now despite all these tools and frameworks, monetary policy isn't a magic wand is it? What are some of the limitations? Definitely not magic. There are significant limitations. One is that the transmission mechanism we talked about can sometimes break down or not work as expected. Well, the central bank might cut its short term policy rate, but maybe long term rates don't fall much or even rise. Perhaps because markets expect future inflation or worry about government debt, you sometimes hear the term bond market vigilantes. So the central bank pulls a lever, but the effect doesn't reach the whole economy as intended. Right. Or maybe businesses and consumers are just too pessimistic or indebted to borrow more, even if rates are low. Confidence plays a huge role. And what about when rates are already near zero? That's a major limitation to zero lower bound. Now I'm going to interest rates can't really go much below zero. If the economy needs a big stimulus, but rates are at or near zero, traditional policy runs out of room. The liquidity trap situation. It can happen, yes, where injecting more money doesn't stimulate lending or spending because people just hoard the cash, perhaps out of fear or because they expect deflation. And deflation itself is a problem here too. A huge problem. Falling prices sound good, but they increase the real value of existing debt and encourage people to delay purchases, waiting for even lower prices. This can create a deflationary spiral that's very hard to escape with monetary policy alone, especially when rates are already zero. This sounds like where quantitative easing or QE comes in. Exactly. QE is an unconventional monetary policy tool used when conventional rate cuts are no longer effective. What does it actually involve printing money? In effect, yes. The central bank creates new money electronically and uses it to buy assets, typically government bonds, but sometimes other assets too, from commercial banks. What's the goal if rates are already zero? Several potential goals. To inject massive amounts of liquidity into the banking system, hoping banks will lend it out to directly lower longer term interest rates by increasing demand for those bonds, and maybe to signal the central bank's strong commitment to supporting the economy and avoiding deflation. The work. The evidence is, well, debated and complex. It seems to have helped ease financial conditions in lower long term rates in some cases, but there are risks. Right. Like, banks might just sit on the extra reserves instead of lending them out. if they lack confidence or see no credit worthy borrowers or the central bank went on buying risky assets. And there are always concerns about unwinding QE later and potential long-term inflationary consequences. So even QE isn't a guaranteed fix. Is there a really fundamental limitation here? I think the most fundamental limitation is that central banks can influence the supply of reserves and the price of borrowing, interest rates, but they can't ultimately control the demand for money or credit. They can lead a horse to water. But they can't make a drink. They can't force households and companies to deposit money, nor can they force banks to lend if the banks deem it too risky or lack capital. That ultimate control over the money supply is limited. Japan's long struggle with deflation, despite near zero rates in QE, is often cited as an example of these limitations. That really highlights the challenges. Now we've focused on monetary policy, but it doesn't operate in a vacuum, does it? How does it interact with fiscal policy, government spending, and taxes? Oh, that's a crucial interaction. The stance of fiscal policy can significantly amplify or counteract the effects of monetary policy. They need to be considered together. Okay, can you give some scenarios? What if, say, fiscal policy is easy, lots of government spending or tax cuts, but monetary policy is tight? Right. Easy, fiscal, tight, monetary. You'd likely see higher output than otherwise, but also higher interest rates, because the central bank is leaning against the fiscal stimulus. Government spending might make up a larger share of national income, potentially crowding out some private investment due to the high rates. And the opposite, tight, fiscal, easy monetary. That tends to push interest rates down. The fiscal consolidation holds back demand, while the easy money encourages private borrowing and investment. So you might see the private sector share of the economy grow. What about when they move in the same direction? Both easy. Easy money. Easy fiscal. That's highly expansionary. You'd expect strong aggregate demand growth. Interest rates might end up lower if the monetary easing effect dominates. Both private and public sectors could grow. Big risk of inflation down the line though. And if both are tight? Tight money, tight fiscal. That's a strong break on the economy. Aggregate demand would likely fall. Interest rates might actually end up higher if the monetary tightening is the dominant force, surprisingly. Both private and public demand would shrink. So the mix really matters for the outcome, not just growth, but also interest rates and the public versus private sector balance. Absolutely. The desired mix depends on various factors. Whether policymakers want to prioritize private investment or public spending, the political climate, the specific economic challenges. And fiscal policy often has its own limitations, right? Like delays in implementing changes. Yes. Significant implementation lags. Getting tax or spending changes through the political process can take time. And politically, it's often much harder to tighten fiscal policy, raise taxes, cut spending, than it is to loosen it. Monetary policy is generally seen as more nimble for short term stabilization. There's also that idea, Ricardian equivalents. Does that play in? It can. The idea there is that people might anticipate the government borrowing today means higher taxes tomorrow, so they save more now, offsetting the fiscal stimulus. If that holds, it makes fiscal policy less effective, and strengthens the case for relying on monetary policy for demand management, though the extent to which it holds in reality is debated. So overall, coordination or at least awareness between monetary and fiscal authorities seems pretty important. Very important. Research, for instance, by the IMF has looked at scenarios like coordinated global fiscal stimulus. The results suggest the impact is much stronger if monetary policy accommodates the fiscal easing rather than leaning against it. The type of fiscal measure also matters. Infrastructure spending might have different effects than tax cuts. And does QE complicate this interaction when the central bank buys government bonds? It definitely can. QE, especially when buying large amounts of newly issued government debt, can look like the central bank is directly financing the government deficit. Monetizing the debt. That's the term. Yes. It can raise concerns about blurring the lines between monetary and fiscal policy and potentially undermining central bank independence and its focus on price stability in the long run. So credibility and commitment are vital, not just for monetary policy, but for fiscal policy too. Absolutely. Persistent large government deficits can push up real interest rates, crowd out private investment, and eventually raise doubts about a country's long-term fiscal sustainability. A lack of fiscal discipline can ultimately harm growth and force monetary policy into difficult positions. It affects global rates and growth too. This has been incredibly insightful. We've really covered the landscape, the roles, the goals, the tools, the transmission lines, the strategies like inflation and exchange rate targeting, the limits, and this crucial interaction with fiscal policy. It's a complex but fascinating area. Understanding these monetary policy fundamentals is really key to making sense of macroeconomic news and, well, how economies function. Definitely. So for you listening, as you keep learning about economics, maybe take a moment to think about the ongoing challenges. In our interconnected global economy with new shocks always emerging, how might these principles of monetary policy need to adapt or evolve? What new challenges might central bankers face in the coming years? Something to ponder. Thanks for joining us for this deep dive.