What Does It Mean to Short a Stock — And Why Is Michael Burry Doing It Again?
The man who predicted the 2008 financial crisis is betting against the AI boom. Here is what shorting actually means, and why it matters.
If you have seen The Big Short, the film about the 2008 financial crisis, you will have heard the word “short” thrown around a lot. It sounds complex. It is not. And right now, the investor the film is based on is doing it again, this time against some of the biggest names in technology.
Michael Burry Is making a bet against the market again
What Shorting Actually Means
When you buy a stock normally, you are betting it will go up. You buy at €10, it rises to €15, you sell and pocket the difference. Simple.
Shorting is the opposite bet. You are betting the stock will go down.
Here is how it works. You borrow shares of a company from a broker and sell them immediately at the current price, say €10. The stock then falls to €6. You buy the shares back at €6, return them to the broker, and keep the €4 difference as profit.
If the stock goes up instead of down, you still have to buy the shares back, but now at a higher price than you sold them for. That is a loss. And unlike a regular investment, where the worst outcome is the stock going to zero, a short position has theoretically unlimited downside. A stock can keep rising indefinitely.
This is why shorting is considered high risk, and why most ordinary investors never do it.
Who Is Michael Burry?
Michael Burry is the founder of Scion Asset Management, a small investment firm. In the mid-2000s, he noticed something no one else was paying attention to: the US housing market was built on a foundation of loans that millions of people would never be able to repay. He bet against it and made roughly $700 million for his investors when the market collapsed in 2008.
That trade was documented in Michael Lewis’s book The Big Short, and later the film of the same name, where Burry was portrayed by Christian Bale.
He is not always right. But when he takes a large, public position, markets pay attention.
What Is He Shorting Now?
In late June and early July 2026, Burry disclosed a series of short positions against some of the most prominent companies in the current technology boom:
- Nvidia, the chipmaker whose graphics processing units have become the backbone of AI infrastructure
- Tesla, the electric vehicle and AI company, shorted at $416.22. Burry’s note: “Happy it jumped back to this level.”
- Applied Materials, a major semiconductor equipment manufacturer
- The iShares Semiconductor ETF (SOXX), a fund tracking the broader chip industry
- Micron Technology, a memory chip manufacturer
- Caterpillar, the industrial equipment company, which Burry said he was “shocked” to be shorting
His thesis centres on semiconductors. Burry pointed to a major spending announcement from Korean chipmakers Samsung and SK Hynix as what he called “the beginning of the end” for the semiconductor cycle. When too much capital floods into building chip capacity, supply eventually outstrips demand, and prices and share prices follow.
He also noted that the broader stock market looks expensive by historical standards. The Shiller CAPE ratio, a measure of how expensive stocks are relative to their long-run earnings, recently stood above 40. That level has historically only been seen at market peaks.
Why Does Any of This Matter?
Burry is one person with one view. He has been wrong before, and he may be wrong now. Timing a market correction is notoriously difficult, and markets can remain overvalued far longer than any short seller can remain patient.
But the underlying mechanism he is describing is worth understanding regardless of whether his bet pays off. Boom and bust cycles in technology are not new. The dot-com collapse of 2000 followed a period of extraordinary enthusiasm about the internet, enthusiasm that was not entirely wrong, but that had driven valuations far beyond what the underlying businesses could justify in the short term.
The question Burry is asking, whether AI enthusiasm has done the same thing to semiconductor stocks, is a legitimate one. The answer will play out over the next few years.
What is certain is this: understanding what a short position is, why someone might take one, and what the risks are puts you in a better position to read financial news. When a headline says an investor is “shorting” something, you now know exactly what that means.
Key Takeaways
- Shorting is a bet that a stock will fall in price, the opposite of a normal investment.
- Short sellers borrow shares, sell them, and hope to buy them back cheaper later.
- Michael Burry, who predicted the 2008 housing collapse, has recently disclosed short positions against Nvidia, Tesla, and the broader semiconductor sector.
- His thesis: the AI-driven chip boom has driven valuations to unsustainable levels, a pattern he compares to the final months of the dot-com bubble.
- Shorting carries unlimited downside risk if the trade goes against you, which is why most individual investors avoid it.