Michael Burry Big Short: Scion's Subprime Bet

Key Takeaways

• Michael Burry shorted subprime mortgage bonds with custom credit default swaps starting in 2005.
• He read individual mortgage prospectuses and saw adjustable-rate loans would default on reset.
• Scion Capital returned 489 percent net from 2000 to 2008; the trade made investors about $725 million.
• Investors revolted while the bet was underwater; Burry restricted redemptions and held on.

Background

Michael Burry was a doctor who left medicine to invest. He ran Scion Capital, a hedge fund he founded in 2000 in Northern California's Silicon Valley, and built a strong record picking undervalued stocks. From its launch on November 1, 2000 through June 2008, Scion returned 489.34 percent net of fees, against a gain of just over 2 percent for the S&P 500 over the same stretch, according to figures cited by Marketcalls and the Syz Group.

By the early and mid-2000s Burry had turned his attention to the housing market. He had owned homebuilder stocks, then changed his mind as he studied how the boom was financed. The Financial Crisis Inquiry Commission's final report records that he decided some of the newer adjustable-rate mortgages were, in his words, "the most toxic mortgages" being created.

His method was unusual for the time. Rather than trust the credit ratings on mortgage bonds, Burry read the underlying loan-level disclosures himself. He told the FCIC he tracked toxic loan features "as they migrated down the credit spectrum to the subprime market," and concluded that "as [home] prices had increased on the back of virtually no accompanying rise in wages and incomes, I came to the judgment that in two years there will be a final judgment on housing when those two-year [adjustable rate mortgages] seek refinancing."

The problem was that in 2005 there was no easy way to bet against these bonds. You could not simply sell them short. So Burry asked the banks to build the instrument he needed.

What Happened

The trade began with custom contracts and an obscure premium drip, then sat underwater for almost two years while home prices kept rising. When subprime borrowers started missing payments, the contracts that had looked like a slow bleed turned into a windfall.

• 2003 to 2005: Burry studies mortgage finance and negotiates one-off credit default swap contracts and ISDA documentation with several banks.
• May 2005: He buys his first subprime credit default swaps, reportedly about $60 million from Deutsche Bank, $10 million each on six separate mortgage bonds, per Michael Lewis's account.
• October 2005: Burry tells his investors that Scion now holds roughly $1 billion of these credit default swap positions.
• Late 2006: Scion's mortgage short reaches its largest size; Burry's FCIC testimony references reducing protection from about $6.7 billion to $800 million.
• Late 2006 to early 2007: Investors, angry that their money is tied up in an illiquid losing bet, demand redemptions and threaten legal action; Burry restricts withdrawals.
• Second half of 2007: Subprime delinquencies spread, the bonds are downgraded, and the value of Burry's swaps soars.
• Early 2008: Burry closes most of the mortgage swap positions; his FCIC testimony puts the final exit around the first quarter of 2008.
• 2008: Scion Capital winds down and returns capital to investors.

By the time the dust settled, the numbers were extraordinary for so small a fund. The housing short earned Scion's investors about $725 million and earned Burry personally about $100 million, according to figures reported by Marketcalls and the Syz Group. The cumulative net return of 489.34 percent from 2000 to 2008 made Scion one of the best-performing funds of its era, even though most of that gain arrived in a single violent move.

The path there was brutal. For nearly two years the position produced only mark-to-market losses while Burry paid out premiums, reportedly around $100 million in total over the life of the trade. The fund had to keep finding cash to fund those premiums, and the longer home prices climbed, the more his investors doubted him.

Why It Happened

The Michael Burry Big Short worked because of a mispricing the rest of the market refused to see. A credit default swap on a mortgage bond works like insurance: the buyer pays a small recurring premium, and if the bond defaults, the seller pays out. Burry's FCIC testimony describes premiums in the range of roughly 85 to 275 basis points a year on the tranches he targeted, a small cost relative to the full value of the bond. Because almost no one expected diversified pools of home loans to fail, that protection was cheap. Burry had looked through the high ratings to the loans inside and concluded the pools were fragile, built on teaser-rate adjustable mortgages that only worked if prices kept rising.

The instrument itself had to be negotiated into existence. There was no standard subprime CDS, so Burry hammered out custom terms in the ISDA master agreements that govern derivatives. His testimony to the FCIC describes pushing banks on three points that would decide whether he could survive the wait. He wanted daily collateral flows rather than monthly, so the value of his winning bet would be recognized as it moved. He negotiated much wider net-asset-value triggers, so a temporary drawdown in his fund could not let a bank tear up the contract. And he fought the asymmetry in threshold amounts, where one bank proposed that Scion post collateral on a $100,000 swing while the bank owed nothing until it was down $25 million. He reached seven or eight such agreements with counterparties including Goldman Sachs and Morgan Stanley, firms he favored partly because they were less tied to mortgage origination than other dealers.

The second reason the trade survived was structural, not analytical. The position lost money for a long time, and his investors wanted out. The redemption terms of the fund let Burry keep money invested in securities that were not freely tradeable, so he restricted withdrawals on the illiquid swap positions and held the bet together while the crowd pulled against him. This ring-fencing, often called a side pocket, is what let conviction outlast doubt. Had investors been able to redeem freely at the bottom, the fund would have been forced to close the trade before it paid off.

Burry was blunt about what his side of the trade implied. He told the FCIC, "There is an argument to be made that you shouldn't allow what I did." His point was not that the short was wrong but that the system let too many take the other side. "When I did the shorts, the whole time I was putting on the positions," he said, "there were people on the other side that were just eating them up. I think it's a catastrophe and I think it was preventable."

By the Numbers

• Scion Capital founded: 2000, with the fund inception dated November 1, 2000. (Verified Investing; Syz Group)
• Cumulative net return, Nov 2000 to June 2008: 489.34 percent, versus just over 2 percent for the S&P 500. (Marketcalls; Syz Group)
• First subprime CDS purchase: about $60 million in May 2005, $10 million each on six bonds, from Deutsche Bank. (Shortform, per Michael Lewis)
• Total CDS exposure by October 2005: roughly $1 billion. (Shortform)
• Peak mortgage protection, late 2006: about $6.7 billion, later reduced toward $800 million. (Burry FCIC testimony)
• Annual CDS premium range: roughly 85 to 275 basis points on the targeted tranches. (Burry FCIC testimony)
• Total premiums paid over the trade: reportedly around $100 million. (Marketcalls)
• ISDA agreements negotiated: seven or eight, with counterparties including Goldman Sachs and Morgan Stanley. (Burry FCIC testimony)
• Position closed: most mortgage swaps exited by the first quarter of 2008. (Burry FCIC testimony)
• Profit to investors: about $725 million; to Burry personally: about $100 million. (Marketcalls; Syz Group)

Aftermath

Burry was never accused of any wrongdoing in connection with the trade. He had bet against the bonds, not misrepresented them to anyone, and the FCIC report treats him as one of several investors who saw the crash coming and positioned for it. His swaps had referenced billions of dollars of mortgage-backed securities and the debt of housing-exposed companies including Fannie Mae, Freddie Mac, and AIG, per the FCIC final report.

Despite the historic result, Scion Capital wound down in 2008 and returned capital to investors. The fight to hold the trade had been costly in ways that went beyond money. Reporting on the period describes Burry as worn down by investor battles, redemption pressure, and the stress of being early for so long. He later relaunched his operation as Scion Asset Management in 2013, according to the Syz Group account.

In 2010 Burry stepped into the public debate over who was to blame. In a New York Times op-ed published April 4, 2010, titled "I Saw the Crisis Coming. Why Didn't the Fed?", he wrote that he had warned his own clients in letters that the mortgage market would melt down, and he criticized the Federal Reserve. He pointed to Alan Greenspan encouraging adjustable-rate mortgages in February 2004 and to subprime loans showing "atypically high delinquency rates" by December 2005, just months after issuance. He argued the warning signs were readable for anyone who looked.

The wider recognition came through Michael Lewis. Lewis's 2010 book "The Big Short: Inside the Doomsday Machine" built much of its narrative around Burry, and the 2015 film adaptation directed by Adam McKay cast Christian Bale as him. The film, released December 11, 2015, won the Academy Award for Best Adapted Screenplay and earned Bale a nomination for Best Supporting Actor, cementing Burry as the public face of the investors who shorted the housing bubble.

Lessons for Investors

1. Do your own work on what a rating actually covers. The bonds Burry shorted carried investment-grade ratings, yet he read the loan-level disclosures and saw the borrowers could not pay once their rates reset. Treat a rating as a claim to verify against the underlying cash flows, not a fact to accept, especially when the crowd agrees an asset is safe.

2. Being early can feel exactly like being wrong. Burry's thesis was correct from 2005, but the payoff did not arrive until 2007 and 2008. For almost two years the position only lost money. A view can be right and still inflict a long, painful drawdown before the market agrees, so size positions to survive that gap.

3. Structure decides whether conviction survives. Burry won partly because he negotiated wider NAV triggers and used redemption terms that let him ring-fence the illiquid trade. The same correct call would have been worthless if a margin clause or a wave of redemptions had forced him out at the bottom. The terms around a bet can matter as much as the bet itself.

4. Asymmetric payoffs let you be patient. A credit default swap capped Burry's loss at the premiums he paid while leaving the upside open. Because his downside was defined in advance, he could hold a contrarian position through ridicule and doubt. When you can cap the loss, you buy the time to be proven right.

5. A single historic win is not a repeatable system. Burry's 489 percent came overwhelmingly from one rare setup that took years to mature. Even he closed the fund afterward and later faced long stretches where the same value approach lagged. Judge any track record across many independent decisions, not by the one bet that became a movie.

Frequently Asked Questions

What was the Michael Burry Big Short in simple terms? The Michael Burry Big Short was Burry's 2005 to 2008 bet that subprime mortgage bonds would collapse, made with custom credit default swaps that paid off when the bonds defaulted. It earned his investors about $725 million.

Why did Michael Burry think the housing market would crash? Burry read individual mortgage bond disclosures and saw the loans were full of adjustable-rate subprime mortgages issued to borrowers who could only keep paying if home prices kept rising. He judged that defaults would surge once those loans reset, which began happening in 2007.

How much money did Michael Burry make on the Big Short? Reported figures put the gain at about $725 million for Scion's investors and roughly $100 million for Burry personally. Over its full life from 2000 to 2008, the fund returned 489.34 percent net of fees against a near-flat S&P 500.

Why were Burry's own investors angry during the trade? The bet lost money for almost two years while home prices kept climbing, and the credit default swap positions were illiquid and hard to value. Investors demanded their money back and threatened lawsuits, so Burry used the fund's redemption terms to restrict withdrawals and hold the position.

What is the main lesson from the Michael Burry Big Short? The core lesson is that being right is not enough; you also need a structure that lets you survive being early. Burry's capped-loss swaps and restricted redemptions let his thesis outlast nearly two years of losses and an investor revolt.

Sources

1. Financial Crisis Inquiry Commission. The Financial Crisis Inquiry Report, Chapter 10: The Madness. 2011. https://fcic-static.law.stanford.edu/cdn_media/fcic-reports/fcic_final_report_chapter10.pdf
2. Burry, Michael J. "I Saw the Crisis Coming. Why Didn't the Fed?" The New York Times op-ed, April 4, 2010 (reproduced). https://www.valueinvestingworld.com/2010/04/ny-times-op-ed-saw-crisis-coming-why.html
3. Michael Burry, prepared testimony and interview before the Financial Crisis Inquiry Commission (ValueWalk archive). https://www.valuewalk.com/michael-burry-testimony-before-the-financial-crisis-inquiry-commission/
4. Marketcalls. How Michael Burry Survived a Two-Year Drawdown Before His $100 Million Win. https://www.marketcalls.in/trading-lessons/how-michael-burry-survived-a-two-year-drawdown-before-his-100-million-win.html
5. Shortform. Michael Burry's "Big Short" of the Housing Market (summary of Michael Lewis, The Big Short). https://www.shortform.com/blog/michael-burry-big-short/
6. Syz Group. Michael Burry Beyond the Big Short. https://blog.syzgroup.com/slow-food-for-thought/michael-burry-beyond-the-big-short
7. Verified Investing. Michael Burry: The Big Short Visionary Who Exposed the Subprime Crisis. https://verifiedinvesting.com/blogs/education/michael-burry-the-big-short-visionary-who-saw-the-crisis-coming
8. The Big Short (2015 film) production and Academy Award record. https://oscars.fandom.com/wiki/The_Big_Short

Disclaimer

This article is educational content only and is not financial advice. Nothing here is a recommendation to buy, sell, or hold any security. Consult a licensed advisor before making investment decisions.