Before the Great Recession, lax requirements to get a mortgage resulted in mass defaults that left nearly 19 million homes vacant.

Watch Margot Robbie explain subprime mortgages—risky loans given to homebuyers with low credit scores or no income verification.

To continue selling mortgages, agencies that determine how risky a loan is gave high ratings to homebuyers regardless of their actual risk portfolio.

Historically, borrowing money from other people to purchase property was common until private financing companies—primarily building and loan associations—stepped in to offer mortgages to buyers.

US homeownership rates declined from the start of the Great Recession through 2016.

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.

Borrowers were increasingly defaulting on private credit loans as of early 2026

Risks in private credit investing include the industry's lack of transparency and the ability of businesses to borrow more than a bank might allow against their debt. Some borrowers in early 2026, for instance, likely did not expect interest rates to be so high for so long, which could be contributing to an uptick in defaults.

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.

To avoid a total collapse of the housing market, the US government took control of the two leading mortgage companies, Fannie Mae and Freddie Mac.

Securitization has become common practice in home financing

When a homebuyer finances with a lender, they aren’t necessarily the one footing the bill. After a buyer secures a home loan, the lender can sell the loan to another financial institution or a private institution. That group can later sell that mortgage to investors. This is called securitization.

In 2008, the 'Big Short' mastermind Michael Burry made more than $700M.

For much of human history, homeownership was primarily associated with the elite

Before the Industrial Revolution, early mortgages were rather exclusive loans given only to nobility. But as more people gained more wealth through the Industrial Revolution, banks began to take on “higher-risk” loans to everyday people.

In 2024, 74% of homebuyers took out a mortgage

Debt owed on mortgages made up about 70% of US consumer debt as of 2025. Mortgage collateral ensures the lender isn’t at a complete loss if the borrower defaults. Under most mortgage contracts, the property is considered collateral under the loan. This means that if a borrower doesn’t repay the loan, then the lender can seize their property.

Pioneered by JPMorgan, credit default swaps are a form of financial derivatives that act as insurance policies for banks issuing assets created with risky loans.

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‘The Giant Pool of Money’ remains one of the most acclaimed accounts of the 2008 housing bubble

This Peabody Award–winning "This American Life" episode traces how cheap global money, subprime lending, and Wall Street engineering inflated the housing bubble. Through vivid reporting and real voices, it became one of the defining works of 2000s financial journalism.

Modern payday lending came about in the late 1990s

In the early 1900s, unlicensed "salary lenders" used to give consumers one-week loans at annualized percentage rates of more than 100%. But wage garnishment and financially abusive practices led some states to create special licenses for lenders and implement rate caps to protect consumers. In the 1990s, a series of deregulations in various states opened the door for the modern payday lending industry to take off.

Refinancing a mortgage is when a homeowner exchanges their current loan for a new one

Homeowners typically refinance to secure a lower interest rate and potentially a new loan term length. Debt owed on mortgages made up about 70% of US consumer debt as of 2025.

The National Housing Act established the Federal Housing Administration

During the Great Depression, 1,000 homes were foreclosed on per day, and half of the mortgages across the country defaulted. To address this crisis, President Franklin D. Roosevelt signed the National Housing Act. It established the Federal Housing Administration, which is still around today and helps protect lenders and buyers.

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.

The movie adaptation of ‘The Big Short’ provided a visual for the 2008 housing bubble

A scene from "The Big Short" visualizes how Wall Street bundled shaky mortgages into complex housing bonds and sold credit default swaps on top of them—showing, step by step, how the structure of the 2008 housing bubble was vulnerable to collapse.

Cheap debt and relatively minimal regulation have fueled private equity's expansion in recent years.

The private credit industry—which offers nonbank loans directly to businesses, particularly privately held midmarket companies—grew from a $250B asset class in 2010 to around $1.5T in early 2024.

How interest rates affect homebuying

Rising interest rates impact every aspect of buying a home. This five-minute article gives a high-level overview of the relationship between the housing market and interest rates.

The rare, so-called 'assumable' mortgage is landing homebuyers a 3% rate.

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.

Banks have increased small loan programs since 2018, upping competition for payday lenders

One of the reasons payday lending flourished for nearly two decades is that most banks charged high overdraft fees and didn't offer small loans. However, since 2018, banks have increased their small loan options. Supporters say this provides safer alternatives for consumers, as banks are subject to more regulatory measures and are less likely to allow consumers to keep rolling over loans.

'Tulip mania,' the 1630s Dutch craze where rare bulbs were briefly traded like luxury assets, may have been the first financial bubble—and it still shapes markets today.

'Floating rate' loans periodically adjust their interest rates in accordance with economic conditions

When the Federal Reserve began raising interest rates in 2022 to combat inflation, interest payments borrowers owed to private credit lenders increased accordingly. Private credit funds benefited as loan returns increased, making the asset class attractive to investors at the time.

The Federal Reserve fought the Great Recession primarily with quantitative easing and repurchasing agreements.

BlackRock played an integral role in the Federal Reserve's response to the Great Recession, managing about $30B of hard-to-sell Bear Stearns assets on behalf of the New York Fed.

Mortgages are loans used to buy property

A mortgage is a loan used to buy property, like a house. Borrowers typically put down a percentage of the cost of the home, and the amount left over is financed through a lender, like a bank.

In March 2008, Bear Stearns was the first major bank to collapse in the Great Recession—leading to panic across the entire global financial system.

Before the modern banking system, most lending resembled private credit

Before the creation of the modern banking system, the majority of loans were negotiated directly between the lender and the borrower—effectively making them private credit transactions.

Alternative investments have become more popular since the 2008 financial crisis

When the traditional markets crashed during the 2008 financial crisis, many people saw the value of their traditional investments plummet and began to look into alternatives as a result.

The lifecycle of a financial bubble often follows a predictable pattern

Economist Hyman Minsky originated what became a five-stage model of an economic bubble: a new “displacement,” a rapid boom, euphoric speculation, early profit-taking by insiders, and finally panic selling. From Japan’s 1980s real-estate surge to the 2008 crash, the pattern repeats across eras and assets.

'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.

BNPL has 19th-century roots, but the pandemic made it mainstream

The modern BNPL model didn't take off until the COVID-19 pandemic, when consumers were stuck at home and lockdowns forced them to shop online rather than in person. The number of US BNPL loans grew more than tenfold from 2019 (16.8 million) to 2021 (180 million), according to a Consumer Financial Protection Bureau report.

Indicators of economic bubbles include euphoric narratives and extreme valuations.

The financial crisis in 2008 had a major impact on many 401(k) plans

Amid the 2008 financial crisis, stocks and bonds cratered as the broader market floundered due to the subprime mortgage crisis. Investors with so-called "target-date" funds—which shift allocations based on the maturation of a fund—shared in the slump, with some funds declining by 20% or more just a year or two away from maturation.