Modern Monetary Theory 101

Modern monetary theory argues that governments can spend more without worrying about debt.

John Maynard Keynes was one of the most influential economists of the 20th century

Keynes influenced economic thought by arguing that governments should spend to stabilize economies during downturns. His ideas shaped the postwar international order and remain central to modern economic policy debates.

What is the function of money?

Nearly everyone uses some form of money to facilitate day-to-day activities, but what is it, anyways? Economists define money as anything that can be accepted as final payment for goods and services. Shells, beads, corn, and a wide range of objects have acted as money throughout history—explore the common but deceptively abstract concept of money in this eight-minute podcast from the Federal Reserve.

The Bretton Woods economic order was built on Keynesian principles

Keynesian economics suggests that governments should actively manage economies to prevent downturns, promote employment, and regulate markets. The Bretton Woods institutions were created based on this belief that coordinated public intervention could prevent the economic crises of the 1930s.

The federal debt ceiling 101

The debt ceiling periodically takes center stage as Congress debates whether to increase or suspend this self-imposed limit on its borrowing authority. Learn the basics on this crucial feature of US fiscal policy with this Q&A.

Watch Ray Dalio explain how the economy works

Dalio describes the economy as a machine that runs on three main cycles: productivity growth, the short-term debt cycle, and the long-term debt cycle. Dalio says layering these three cycles on top of each other essentially creates a template for understanding changes in the economy.

Minting a coin that can pay off the federal debt has been proposed as a quick fix to rampant borrowing.

Visualize $102T of global debt, based on data from the International Monetary Fund's October 2024 outlook.

What is quantitative easing?

Quantitative easing was a relatively new method the Federal Reserve used to curb deflation during the Great Recession. In this process, a central bank digitally creates money that is used to purchase assets, usually government bonds. This lowers returns on low-risk bonds, encouraging investors to put their money in high-risk, short-term stocks, and moves money through the system.

Microfinance, conceived as a solution to conservative critics of Western aid as a handout system in the 1980s, is a small-dollar, community-based financing structure that was originally created as a way to expand access to credit and end poverty.

The Federal Reserve follows the health of the US economy by tracking the money supply

That includes all of the physical and electronic money in circulation. It tracks not only US coins and bills, but also the money that moves through bank deposits. The Fed uses metrics called trackers to follow different types of transactions through the money supply.

In the aftermath of the 2008 financial crisis, the Fed began a program of quantitative easing

This program injected trillions of dollars of new money into financial markets to stimulate the economy. The move catalyzed an 11-year bull run and was repeated during the pandemic. Experts argue such power could worsen wealth inequality and contribute to bubbles in housing and finance.

Learn about what causes economic bubbles, including how forces like cheap credit, soaring optimism, and feedback loops push asset prices far beyond fundamentals—until a single shock triggers panic, selling, and a rapid collapse.

Modified Newtonian dynamics revises gravity to eliminate the need for dark matter

Rather than imagining that an undiscovered particle is responsible for discrepancies in the orbits of stars and galaxies, MOND suggests that the mathematics underlying Newton's laws of gravity and force change beyond a certain scale. However, the suggested revisions struggle to explain relativistic effects involving gravity, including gravitational lensing and gravitational waves.

Inflation explained in under 3 minutes

Keep seeing inflation in the news, but don't have a great grasp on what it means or how it works? This overview from 1440 breaks down how economists think about inflation, what it means for the average consumer, and how governments attempt to keep rising prices in check through various policies.

Why Ray Dalio thinks the US deficit is a political problem

Dalio frequently argues that debt cycles are inevitable and a tradition of every empire. However, he said in 2025 that the US was headed for a debt crisis. Dalio says that while Republicans and Democrats agree on the math of the debt crisis, all politicians make promises to neither increase taxes nor cut government benefits—which Dalio says can't close the deficit.

The Fed can use quantitative easing to stimulate growth once it has lowered the federal funds rate as far as it can go

This involves purchasing large-scale assets from banks beyond just Treasury bills and bonds. This effectively gives banks much more liquidity, with the hope that they will actively lend it out at cheaper rates and expand the economy. But quantitative easing runs the risk of sparking inflation.

The role stories play in mass economic trends like bitcoin, crashes

Economics is dominated by numbers, but stories play a huge role in the emotional shifts seen within macroeconomic trends. For example, bitcoin is not just a cost-benefit winner, but a compelling tale of decentralization and independence. This is a 20-minute summary of Nobel prize-winning economist Robert Shiller's "Narrative Economics."

Tax policy can have a direct impact on the national debt, with past presidents' changes to tax codes inflating the deficit.

Arguments for returning to a gold standard reappear from time to time

However, critics argue that globalization has made the gold standard impractical for modern economies, as it limits a nation’s ability to have a flexible monetary policy—hence, none of today's governments have a gold standard.

Harry Dexter White outmaneuvered Keynes to make the dollar the center of the new global monetary system

The chief US Treasury economist at the conference, White, advocated for a dollar-centered exchange rate system over Keynes' competing idea of a new global currency, shaping the postwar economic order for decades.

How chaos helps explain why small market corrections can produce major economic instability

Oxford University complex systems professor Doyne Farmer discusses how predictions from many economic models are overly weighted toward simple relationships, such as supply and demand, and external shocks, such as the COVID-19 pandemic. However, real-world macroeconomic systems involve public and private actors interacting, producing feedback loops and cascading effects that resemble the oscillatory behavior seen in chaotic systems.

Some economists argue that the national debt is not a critical concern.

While the Fed is involved in issuing new generations of cash, the way it adds to the money supply does not involve printers

The majority of money in circulation is credit, not cash. This credit, which acts similarly to direct deposit from employers, is added to bank accounts by the Federal Reserve. The Fed also employs tools like the federal funds rate and open market operations to expand or contract credit.

For everyday Americans, a relatively high national debt can lead to higher interest rates on financial products such as mortgages.

New Deal programs still shape mandatory federal spending today

Many of the largest items in today's federal budget—especially mandatory programs—trace their origins to Franklin D. Roosevelt's New Deal. This podcast explores how those policies reshaped federal spending and government responsibility.

Dow Theory laid the groundwork for modern market analysis

Developed by Charles Dow in the late 19th century, Dow Theory argued that markets move in trends. Its principles—confirmation, trends and volume—still influence technical analysis today.

The IMF was created to prevent the currency crises that destabilized the 1930s global economy

Founded in 1945, the IMF monitors exchange rates, promotes financial stability, and provides emergency funding to countries that cannot pay for their imports. It currently has 191 member countries and acts as a lender of last resort for struggling economies.

What is the 70-20-10 budget?

The 70-20-10 budget rule dictates that people should spend 70% of their income on needs, 20% on savings, and 10% on wants. It's a new take on the 50-30-20 budget, which claims people should aim to spend 50% of their income on needs, 30% on wants, and 20% on savings. Learn more about this budgeting strategy by reading this article.

The national debt is growing at a faster rate than the economy.

A centrally planned economy is one where the government—not markets—sets production

This Investopedia article explains how command economies work, which countries have used them, and why even market-based nations like the US sometimes adopt tools such as rationing or price controls during wartime or national emergencies.

Use this interactive calculator to see if you could rebalance the federal budget by adjusting taxes and spending.

Local governments borrow money for long-term projects by issuing municipal bonds

When a city needs to build a school, a road, or a water treatment plant, it usually issues a municipal bond—borrowing money from investors to be paid back over time. The market for these bonds now exceeds $4T.

When the US hits the debt ceiling, the Treasury uses emergency measures to avoid default

After the US reached its debt ceiling in January 2023, the Treasury deployed "extraordinary measures" to keep paying obligations. This article explains the steps, how they work, and why they last only for a limited time. (Some readers may experience a paywall.)

Federal spending falls into 2 categories: mandatory and discretionary

Federal spending is split between mandatory programs, funded automatically by law, and discretionary programs, funded through annual appropriations. This video breaks down which major programs fall into each category and why the distinction matters.

Learn why modern scientific patterns have been described as theories rather than laws

After confirming that the accuracy of some laws of physics is limited to certain domains, science became more hesitant to categorize identified mathematical relationships, such as quantum mechanics, as unchanging laws. Instead, these recent, complex frameworks are designated as theories to acknowledge that they are conditional and may be part of a larger, more complete future framework.

In 2023, the US money supply fell at its fastest rate since the 1930s

The money supply tracks how much cash, as well as electronic funds like savings accounts, is circulating through the economy. And a downward turn can be a bad sign.

The Bretton Woods conference in 1944 created the foundations of the modern global economy

In July 1944, 44 nations gathered in Bretton Woods, New Hampshire, to create a new postwar economic order. The conference led to the creation of the IMF and the International Bank for Reconstruction and Development—now known as the World Bank.

The federal deficit is the gap between what the US spends and what it collects.

Interest rates have historically been an indicator of the US economy's overall health.

The two-day marathon meetings of the Federal Open Market Committee follow a logical process of information sharing

In a stately room in the Eccles Building in Washington, DC, the 17 participants of the FOMC and their aides report on economic conditions and decide monetary policy.

No institution wields more power in US finance than the Federal Reserve, the central bank of the US—but opinion polls indicate that most Americans don't know what it does.

America’s looming debt spiral

The United States has a debt problem. In 1989, the national debt was almost $3T. As of 2023, that number had ballooned to more than $30T. This video explains why the national debt grew so quickly, and what America's options are going forward. It also explores why the problem is trapped in political gridlock. Watch it to find out more.

British economist John Maynard Keynes originally proposed a global currency called the bancor.

During COVID-19, the Fed made drastic moves in attempts to shore up the US economy called quantitative easing

The Fed took an aggressive approach to help the US economy during COVID-19 beyond standard monetary levers, including broad purchases of mortgage-backed securities, Treasury securities, and more.

Japan's 1990s deflation followed the country's fastest growth period

The end of World War II ended Japan's isolation in the global economy, prompting what's now called the "Japanese Economic Miracle." From the 1940s to the 1980s, Japanese policy makers enacted ultra-loose monetary policies that pushed a ton of cash into the market and fueled rapid growth. But these policies ultimately helped create a bubble and sent the country into a deep period of deflation.

Visualizing the history of money

Money is any medium of exchange used in payments for goods or services and can take many forms. From cattle and shells in ancient times to paper and blockchain today, money has taken many shapes and sizes. This infographic illustrates some of the major forms of exchange world cultures have used over the last 5,000 years.

Recessions are considered to be inevitable by modern economic standards

Recessions are caused by imbalances in the market and are guaranteed to happen in capitalist systems, but predicting them is a complex task.

View a breakdown of the mathematics behind the Standard Model

The Lagrangian version of the theory—related to the system's energy—presents a vast mathematical equation, with different components representing various force interactions and types of particles, including ghost particles to cancel out mathematical redundancies.

Inflation is a monetary phenomenon in which consumers see a broad rise in the prices of goods and services across the economy over time

Sustained periods of inflation are often caused by central bank policies including low interest rates or increased money supply. With more money chasing the same number of goods and services, prices tend to rise and the value of a single dollar drops.