How a Reddit thread drove GameStop's stock price up and gutted the pockets of short sellers

In early 2021, GameStop's stock surge brought retail investing into the spotlight

Using platforms like Robinhood, everyday investors became a growing presence in financial markets during the Gamestop short squeeze, revealing the influence retail investors can have on the market.

GameStop stock began a meteoric rise in January 2021, rallying from a low of $2.57 to as high as $438 when Keith Gill helped mobilize retail investors to drive prices higher

Keith Gill was a financial advisor who posted on social media under usernames including "Roaring Kitty." Backing from Chewy founder Ryan Cohen, who became GameStop's CEO, took things up a notch.

A short squeeze happens when short sellers increase stock prices by buying shares back quickly

When short sellers realize their positions may be incorrect—usually triggered by increasing share prices—they often try to quickly buy back their shares in order to minimize their total losses. When this happens on a large scale, that buying activity can drastically increase to represent the seemingly high demand for that stock. The result is called a "short squeeze," which refers to short sellers literally being squeezed out of their positions by rising prices.

The Reddit forum r/WallStreetBets is a place to discuss high-risk trading strategies

r/WallStreetBets is a forum (aka a “subreddit”) on the social media platform Reddit that was started in 2012. Later, r/WallStreetBets evolved into a place where unconventional investment approaches were not just tolerated, but planned and celebrated. It’s perhaps most famous for its role in the GameStop saga.

Hear why one short seller thinks short selling is now more important than ever

Carson Block runs an investment research firm and hedge fund, Muddy Waters Research and Muddy Waters Capital. Block is known for being an activist investor focused on identifying fundamental business problems that might cause a stock to be overvalued. Block says a decrease in investigative financial journalism, deregulation, and less oversight of businesses overall have increased the scope and scale of fraud, making short sellers that suss out overvalued stocks incredibly important.

Tesla short sellers benefited from the company's poor performance in 2025

Tesla was widely considered the most-shorted stock until 2024, despite consistent short-seller losses. Between 2016 and 2020, short sellers reportedly lost more than $11B as Tesla's stock price continued climbing. However, long-held short positions began paying out in 2025 as Musk's foray into politics and his eventual feud with President Trump hurt Tesla's stock performance. In 2025, Tesla short sellers made more than $10B.

Retail investors are getting burned by long/short strategies

In the US, many retail investors lack the SEC-mandated status (a high enough net worth, income, and other factors) to directly invest in hedge funds. The regulator considers hedge funds too risky for the masses. Hedge fund-like strategies have emerged as a workaround, despite potential pitfalls.

Who is Michael Burry?

Michael Burry is best known for shorting the mortgage bond market in 2007. Before the Great Recession, the legendary investor’s firm took a stake in GameStop and argued the company was being undervalued in 2019. Learn more about Burry’s historical impact on markets here.

Porsche briefly made Volkswagen the most valuable company in the world in 2008

In the wake of the 2008 global financial crisis, hedge funds began placing short positions on German automaker Volkswagen. Around the same time, Porsche began acquiring a majority stake in Volkswagen, which decreased the amount of available shares, or the "stock float." Porsche then announced that it owned more than 74% of the company, prompting short sellers to realize they had placed more short positions than were logistically possible given that less than 6% of the company's shares were available to trade. In what is largely recognized as the biggest short squeeze in history, Porsche made $10B, and hedge funds lost more than $30B.

Hear how the Piggly Wiggly grocery store founder attempted to squeeze short sellers by cornering the grocery store's stock

Founded in 1916 in Memphis, TN by Clarence Saunders, Piggly Wiggly was the first modern grocery store with aisles for customers to shop for themselves. In 1922, investors placed short positions, sensing that the stock may be overvalued after several Piggly Wiggly franchises in the Northeast went bankrupt. Saunders attempted to squeeze short sellers by taking out $10M and buying up nearly 99% of all available Piggly Wiggly stock. Ultimately, the fiasco ended with Piggly Wiggly's stock being permanently banned from the New York Stock Exchange and Saunders leaving Piggly Wiggly and filing for bankruptcy.

A landmark hedge fund court case once reshaped high finance

Hedge fund traders tied to insider trading by probing prosecutors are relatively rare. When billionaire hedge fund legend Steve Cohen, founder of SAC Capital, pleaded guilty to trading on inside information, Wall Street trembled. The outcome of the case remains a cautionary tale for traders today.

How ‘vulture’ hedge funds make money

Some hedge funds specialize in snapping up distressed assets, like failing newspaper chains, and further stripping down their operational expenses in a bid to make a profit from the initial capital outlay. Delve into how one secretive firm known for the practice operates—and what’s at stake for the broader economy.

How one supplement company cost a short seller $1B

Pershing Square, a hedge fund founded and run by Bill Ackman, put short positions on Herbalife in 2012, because it believed the company was a pyramid scheme. Ackman's longtime rival and legendary investor Carl Icahn began buying Herbalife shares, causing the stock price to rise—ultimately hurting Pershing Square's short position.

See a real-time list of the most shorted stocks in the US

Every two weeks, the Nasdaq and New York Stock Exchange release the stocks with the most short positions. Some of the companies with the highest short positions as of early 2026 were Hims & Hers and Groupon.

The history of Reddit, the front page of the internet

The hyperactive online forum and social media platform has transformed since 2006 from a simple link-sharing site to a behemoth in digital media. Topping off its ascendancy, Reddit went public on the New York Stock Exchange in 2024, solidifying its future amid a shifting technological climate. Dive into Reddit's nearly two decades of growth with this detailed timeline.

Hedge funds, the private investment firms that trade a wide swath of financial assets, make money by imposing steep fees on investors and from the fund's investment performance.

Meme stocks often have little underlying value but are fueled by crowd funding

"Meme stocks" is a phrase originating in the early 2020s, referring to companies with little underlying value who gain recognition through social media and whose stock price experiences rapid gains.

'The Great Onion Corner:' Hear how short-selling onions ended with a ban on onion futures

In the early 1950s, onion farmer and produce trader Vince Kosuga cornered the onion market, resulting in a 1958 ban on onion futures from Congress. After stockpiling onions and buying onion futures, Kosuga then began shorting them. Then, he released his accumulated surplus of onions, driving the price down to essentially zero, and cashed in his short positions.

The stock market, explained in 3 minutes

Curious about the inner workings of the stock market? 1440's got your breakdown of how it works.

Activist investors use large ownership positions to influence companies

By holding large ownership positions, which often come with leveraged access to a company's board or the ability to force a shareholder vote, activist shareholders can change a company's corporate governance, leadership, and overall direction. Critics argue that activist shareholders hurt companies in the long term by prioritizing short-term higher shareholder returns over sustainability and growth efforts.

Read Jeff Bezos' letter to Amazon shareholders from 2000, when shares were down more than 80%

"Ouch. It's been a brutal year for many in the capital markets and certainly for Amazon.com shareholders," the letter begins. Amazon shares were down more than 80% from the prior year at the time.

How Netflix battled Blockbuster

The most consequential business stories involve intense rivalries. The story of Netflix versus Blockbuster is one of those: an agile upstart versus an entrenched incumbent. This nine-part podcast explores the key strategies and pivotal moments in the rivalry that upended the entertainment business, setting the stage for the streaming wars.

American CEOs getting super rich has a lot to do with stock buybacks

In 1965, the pay gap between American CEOs and their workers was roughly 15-to-1. But by 2018, that ratio had ballooned to 220-to-1.

Herd behavior is one cause of economic bubbles

A video breaks down the core forces behind economic bubbles, illustrating how forces including 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 world's most famous case of deflation happened after Black Thursday

While the details are not fully agreed upon, many economists point to the Federal Reserve's tightening of the money supply as a prime culprit, leading to a significant deflationary spiral.

Google had a quirky, auction-based IPO

In its sixth year, Google's shareholders reached a size where regulators would require the company to publicly report its financials. This prompted the company to go public through an unconventional style: the Dutch auction. The company auctioned its shares starting from a high price and dropping to a lower level.

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%.

SpaceX's S-1 or 'prospectus' revealed many previously unknown details about the company, including its unprofitability despite doing $18.7B in revenue in 2025, exactly how many voting shares Elon Musk will have in the company (roughly 85%), and more.

Netflix profits when you're not watching, and its movies are designed that way—read a detail-rich critical essay exposing lesser-known Netflix takes

Fast-casual restaurant Chili's is experiencing a resurgence, with its parent company recently reporting a nearly 32% increase in sales, thanks to passionate Gen Z fans on TikTok.

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.

Gerrymandering works through two techniques: cracking opposing voters across districts to dilute their power, and packing them into a few to waste their votes in lopsided majorities.

The 1987 Nintendo video game 'Stadium Events' isn't known for being particularly fun, but its scarcity has made it a highly sought-after item that has sold for up to $35K at auction.

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

Telehealth demand for GLP-1s for weight loss is booming as consumers seek easier access.

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

A vending machine run with Anthropic's AI went out of business after it was convinced to give away items for free and sell a video game console.

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.

Up to a million Girl Scouts sell about 200 million cookie boxes every spring, generating $800 million, largely because refusing a child is frowned upon

A 2019 Facebook event called on attendees to "Storm Area 51, They Can't Stop All of Us," resulting in countless memes, the creation of a music festival, and eventually the arrests of those who did try to approach the area.

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.

The price of gas is a composite made up of several different factors, with the federal gas tax making up less than 20% of what drivers pay at the pump.

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

Discover the catastrophic consequences of a failure of the US electrical grid—something that is more likely than many Americans think.

Long before Major League Baseball began allowing instant replay for balls and strikes, an umpire reluctantly used the technology to determine whether a hit was a home run, a move that inadvertently ushered in a new era for the sport.

Memecoins are a type of cryptocurrency—a form of digital currency with a wide variety of uses—created around popular 'memes,' or viral internet jokes.

A researcher recently discovered an interview from 1967 between groundbreaking journalist Joan Didion and the Grateful Dead, years before the band became an institution.

Experimental hantavirus vaccines and therapies, still under development, have long been funded by the US military.

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

The first steps to rebuilding your credit score include getting to know exactly what's on your credit report and figuring out how far you are from the '700 club,' or 'good score' range.