The world's most famous case of deflation happened after Black Thursday

The Great Depression is one of history's most notable periods of deflation

The stock market crash of 1929 helped trigger a period of deflation in the United States by creating a drastic decrease in the total money supply. Because of the United States' central role in the world economy, virtually every single country was impacted by the recession.

'Good deflation' happens when prices naturally track with supply, meaning prices change gradually

This tends to make products and services more affordable and normalizes the standard of living. Bad deflation usually happens when there are sudden changes to either supply or demand. Near-zero [interest rates helped create the real estate bubble that sparked the Great Recession when it crashed](https://www.youtube.com/watch?v=LMo9mD8j7IA&t=91s) Because deflation distorts the value of money, deflation is particularly harmful for borrowers. Low interest rates made it easy for businesses and everyday people to take on enormous debt, which exacerbated the effects of the recession.

Economists define deflation as a sustained decline in prices across an economy

Deflationary periods are characterized by broad, significant price declines. The Federal Reserve can monitor deflation by tracking prices through price indexes, such as the Consumer Price Index (CPI), which characterizes the average costs for consumers each month.

US inflation can generally be split into to two periods—before and after the Federal Reserve

A central bank itself does not mean significant inflation will occur, but economists generally point to factors like two world wars and the printing of money to finance the US federal deficit as primary drivers of price increases.

The psychological aspect of deflation makes it difficult for policymakers to stabilize the economy

That psychological aspect is referred to as "the deflationary spiral." When prices start decreasing, people tend to hold on to their money to pay the lowest prices. But as prices start stabilizing, people resist increasing prices. (Some users may experience a paywall.)

Read former Fed chair Ben Bernanke's 2002 speech about preventing deflation

Very low inflation rates in the early 2000s in the United States and a worsening recession in Japan sparked some domestic concern over the threat of deflation. While Bernanke wasn't Chair at the time of the speech, he emphasized the Fed's role in preventing deflation.

The term ‘Black Friday’ originally referred to a 1869 US gold market crash

After financiers Jay Gould and James Fisk attempted to corner the US gold market, the market crashed on September 24, 1869, bankrupting thousands of investors and sending stock prices plummeting by 18%. That day became known as “Black Friday” long before the unofficial retail holiday emerged.

The 1929 stock market crash is a defining example of a financial bubble burst

Fueled by margin speculation and intense optimism, stock prices soared to unsustainable levels before collapsing in late October—erasing billions in market value within days.

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.

COVID-19's shock to employment rates sparked some economists to fear deflation

COVID-19 simultaneously disrupted the supply chain and the labor market. Since the unemployment rate had hit record highs, some economists were worried that the supply chain would recover before the labor market. If that had happened, businesses would have been producing goods, but no one would have been able to buy them because they wouldn't have the disposable income to do so.

Switzerland's currency is so strong that it could cause deflation

Economic instability in the United States in 2025 strongly benefited Switzerland, where the value of the franc relative to the dollar increased by about 12.7%. In response, the price of imports dramatically decreased, making goods overall much cheaper.

The 2008 financial system unraveled in a wave of speculation

Michael Lewis—author of the bestselling "The Big Short"—explains how a wave of speculation (among other factors) drove the 2008 collapse, from lenders issuing risky mortgages to Wall Street turning them into fragile securities. He also highlights the few outsiders who recognized the bubble and bet against it before the crash.

Inflation was a word before deflation was

The word inflation has Latin roots and technically means an influx of air, first appearing in the English language in the 1890s to describe bike tires. Deflation's first known mention in an economic text was in 1919.

FTX, one of the world's largest crypto exchanges, collapsed in 2022

As crypto markets declined during the post-pandemic slowdown, Sam Bankman-Fried propped up the markets with billions he'd earned leading FTX, one of the largest crypto exchanges. Then, in one of the most rapid financial implosions in modern history, the exchange collapsed as investors rushed to withdraw money.

Get the inside story of the duck hunt that birthed the Federal Reserve

Pseudo-duck hunters, private train cars in Hoboken, and a thrilling work week over Thanksgiving 1910—all and more are featured in the wild story of how a group of fed-up bankers and lawmakers tried to create an enduring central bank for the US. Records of the meeting managed to remain hidden for decades.

The worst US bank runs since 1900

From the Panic of 1907 to the Silicon Valley Bank collapse in 2023, this bank scholar and former Fed official goes into the history of the country's worst bank runs.

FDR changed the date of Thanksgiving, then changed it back

In the waning years of the Great Depression, President Franklin Delano Roosevelt attempted to move Thanksgiving up by a week, giving merchants a longer holiday shopping season. After pushback from lawmakers, he reversed course in 1941, permanently fixing the date of Thanksgiving on the fourth Thursday of November.

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.

The idea for the Federal Reserve was conceived in secret in 1910—with bankers donning duck hunt gear for disguise while traveling to a remote country club on Georgia's Jekyll Island

Ray Dalio considers betting against the US debt load in 1982 among his biggest failures

In the early days of his hedge fund, Bridgewater Associates, Ray Dalio calculated that the US had accumulated more debt than it was possible to repay. He took short positions in the market that backfired when the Federal Reserve cut interest rates and avoided a global economic collapse. Dalio lost everything and even had to borrow $4K from his dad—but often describes this experience as one of the most pivotal moments in his career.

Consumer spending accounts for 70% of US GDP, making Black Friday significant

Lizabeth Cohen, a history professor at Harvard and author of the book “A Consumer's Republic: The Politics Of Mass Consumption In Postwar America,” has argued that the US government has presented consumerism as a way out of economic crisis or decline since around World War II.

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."

A nuanced break down of how tariffs are impacting prices

As tariffs have increased to their highest levels since the 1930s, economists have kept a close eye on retail prices. This chart and accompanying explainer shows correlations between key tariff announcements and news and the costs of roughly 350,000 goods from five major retailers.

The Beanie Baby craze is known as one of the wildest collectible bubbles in history

The Beanie Baby boom saw collectors drive prices for stuffed animals into the hundreds or thousands of dollars, fueled by hype surrounding scarcity and online bidding wars. When demand collapsed in the early 2000s, the market crashed—leaving steep losses for many speculators.

The US dollar is the most widely circulated currency in the world, and is involved in nearly 90% of global transactions

Hear how the Black Death reshaped Europe's economy

The Black Death killed tens of millions across Europe, but the labor shortages that followed shifted economic power. With fewer workers available, survivors demanded higher wages and better conditions—sparking what historians call a medieval “Golden Age of Labor.”

The history of credit cards begins with the 'Fresno Drop.'

On a 1958 morning in Fresno, California, about 60,000 people woke up to find a strange rectangular piece of plastic on their doorstep without explanation. Those chosen for the "Fresno Drop" didn't know it yet, but Bank of America was behind the credit card delivery stunt.

US consumers collectively owe more than $1T to credit card companies—almost as much as they owe in auto loans.

Volcanic activity may have triggered the Black Death by spewing gases that led to crop failures in Europe, thus forcing the import of grain ships with plague-infested fleas.

Warren Buffett's former professor Benjamin Graham is known as the 'father of value investing,' a strategy in which investors seek to buy stocks trading below their intrinsic worth.

When a Paris department store hesitated to sell Estée Lauder's perfume, she 'accidentally' broke a bottle, causing the smell to spread throughout the store and shoppers to start asking to buy the scent.

Exploring the Larry Bird punch that almost changed March Madness

View the ten deadliest tornadoes in US history.

Explore fun facts from the USPS, including unique post office buildings, a stamp that traveled past Pluto, and more.

Domino's Pizza's 30-minute delivery guarantee was responsible for the chain's 1980s surge, but it was discontinued after the company was found liable for delivery driver accidents.

Fireworks make a loud booming sound after exploding due to air expanding faster than the speed of sound.

How Amazon operates a 'flywheel' business model, a self-reinforcing cycle that drives continuous growth

The Nasdaq's 'Magnificent 7' companies are responsible for roughly 40% of the Nasdaq 100 index's gains, while the remaining 93 companies account for the other 60%.

Some coin denominations have ridges etched on their sides, partly to prevent counterfeiting, in a practice called 'reeding.'

After the Boston Tea Party, colonists switched to coffee, which became the main morning drink for revolutionaries.

Chaos theory—informally known as the butterfly effect—is the reason why weather forecasts are presented with probabilities rather than certainties.

70 years ago today, city officials in Santa Cruz, California, banned rock 'n' roll to protect its youth from corruption after witnessing a 'provocative' concert the night before.

Double world record holder Hunter Ewen helped conquer his fear of balloons, called globophobia, by training to win Guinness World Record titles for balloon inflation.

US housing costs have risen by roughly 175% between 1991 and 2026—but a growing number of Gen Zers are becoming homeowners anyway. In 2025, 4% of homebuyers were Gen Z, up from 3% the year before.

One disco producer saw 'Star Wars' four times on its opening weekend and was so inspired that he recorded the album 'Star Wars and Other Intergalactic Funk,' which produced a chart-topping single.

Art theft is the third-largest source of criminal revenues worldwide, thanks in part to the subjective nature of valuing a work of art.

The tragic Pulitzer Prize-winning image 'The Vulture and the Little Girl' (1993) generated controversy, raised concerns about ethics in photography, and eventually led to the photographer's death.

Dorothy's famous entrance into Oz in 'The Wizard of Oz' relied on analog tricks, including a body double and sepia-toned paint, as much as it did on technology

Fear or disgust related to clusters of holes and cracks, called trypophobia, may stem from evolutionary processes to help us avoid pathogens.

According to the physics of black holes, our 4D reality may be a hologram—a projection of information coded on a 2D surface on the edge of the universe.