Kyle Bass Subprime Short: Hayman's Big Bet

Key Takeaways

• Kyle Bass founded Hayman Capital and shorted subprime mortgage bonds using credit default swaps.
• His thesis: flat house prices alone would wipe out the lower bond tranches.
• Hayman reportedly returned over 200 percent in 2007, with roughly $500 million in profit.
• He warned Bear Stearns and a Fed board member in 2006 and was dismissed.

Background

Kyle Bass spent the late 1990s and early 2000s on the sell side. He has stated under oath that he was a senior managing director at Bear Stearns for about five and a half years, from 1996 to 2001, and he later worked at Legg Mason before striking out on his own. The Hoover Institution describes him as having held senior roles at Bear Stearns and Legg Mason before founding his firm.

He launched Hayman Capital Management in late 2005, with the firm operating from Dallas. Contemporary profiles describe a small startup fund, founded with roughly $10 million in assets and built into a global asset manager. By the time of the crisis, Bass told the Financial Crisis Inquiry Commission, Hayman was "a global asset management firm that managed several billion dollars of subprime and Alt-A mortgage positions during the crisis."

His edge was analytical, not connected. Bass and his team dug into how subprime and Alt-A mortgages were pooled and sold as securities, and into who was actually borrowing. In one account of the research, recounted in an interview with Max Raskin, Bass described a phone call with a mortgage analyst in which the implication became clear: "if home prices just go flat, you realize the bottom three tranches of this entire pool get wiped out." His team also isolated mortgage pools in regions hit by job losses, looking for where defaults would land first.

That conclusion ran against the consensus on Wall Street. Most analysts assumed house prices tracked income and job growth, both of which were still rising. Bass thought the causation ran the other way and that the loans themselves were the problem.

What Happened

Bass did not just build a position quietly. He tried to warn the people most exposed, was waved off, and then placed his bet through derivatives that paid out when the mortgage bonds soured.

• Late 2005: Bass founds Hayman Capital Management in Dallas after leaving the sell side.
• 2006: Bass becomes convinced there is a US residential real-estate bubble and begins building short positions against subprime mortgage securities through credit default swaps.
• September 2006: Bass meets with Bear Stearns risk and trading managers, including chief risk manager Bobby Steinberg, and presents his housing thesis. He is told, in his recollection, "Kyle, you worry about your risk management, and we'll worry about ours."
• 2006: After meeting a White House staffer, Bass presents the same case to a Federal Reserve board member in Washington and is again dismissed, with the response that incomes and jobs were still growing.
• 2007: Subprime delinquencies climb, the bonds are downgraded, and the value of Hayman's credit default swap positions rises sharply. The fund reportedly returns more than 200 percent for the year.
• March 11, 2008: Hayman tries to move a large subprime derivative position away from Bear Stearns as a counterparty. According to FCIC interview records, Bass was the source for a CNBC reporter's pointed questions to Bear Stearns days before the firm collapsed.

By 2008 Bass had become a public figure. He testified as an expert witness before a US House Financial Services subcommittee in 2007, then before the FCIC at its first public hearing on January 13, 2010, and was interviewed by FCIC staff on April 26, 2010, per the commission's own records.

The trade's most striking feature was its timing. Bass put on the bet before defaults were visible in the headline data, when betting against diversified mortgage pools still looked eccentric. Then the loans reset, borrowers stopped paying, and the bonds he had insured against fell apart on schedule.

Why It Happened

The Kyle Bass subprime short worked because of a mispricing the wider market refused to accept. A credit default swap on a mortgage bond works like an insurance policy: the buyer pays a recurring premium, and if the bond defaults, the seller pays out. Because almost no one expected pools of US home loans to fail together, that protection was cheap. Bass had looked through the high ratings to the loans inside and concluded the pools were fragile.

His central insight was that house prices did not even need to fall for the trade to win. In his FCIC testimony he explained that if housing prices "just went flat," the securitizations "would have lost 9 or 10 percent," which "would have wiped out everything up to close to the AAs." In a mortgage bond, losses hit the lowest-rated tranches first and climb upward, so a modest loss rate could destroy the bottom layers and threaten even highly rated pieces. The structure that was supposed to make the bonds safe is exactly what made the lower tranches so exposed.

The research was bottom-up. Rather than trust the ratings, Bass and his analysts studied the loan pools and the borrowers behind them. He has described looking at long-run housing data, plotting price appreciation against inflation and median income going back decades, and concluding the gap was unsustainable. He also examined how loose underwriting had become, the kind of environment where, as he put it to the Hoover Institution, "a bartender can have three loans."

A second theme in his account is the danger of the derivatives plumbing itself. In his FCIC testimony Bass argued that the over-the-counter derivatives market allowed dealers and supposedly top-rated counterparties to take enormous risk without posting collateral up front. He noted that asset managers like Hayman "have always been required to post initial collateral and maintenance collateral for virtually every derivatives trade," while firms such as AIG were not, letting risk in some derivatives books run, in his telling, to many times the firm's equity. That asymmetry is why he worried about who was on the other side of his winning trade. As Bear Stearns wobbled, Hayman tried to move its position to a stronger counterparty.

By the Numbers

• Hayman Capital founded: late 2005, in Dallas, reportedly with about $10 million in assets. (Institutional Investor; MoneyWeek)
• Mortgage exposure during the crisis: "several billion dollars of subprime and Alt-A mortgage positions," in Bass's own words. (FCIC testimony, January 13, 2010)
• Loss threshold in the thesis: flat home prices would cause roughly "9 or 10 percent" losses on the securitizations, enough to wipe out tranches up to near the AAs. (FCIC testimony)
• 2007 fund return: reported as more than 200 percent, with figures cited around 212 to 216 percent. Mark as reported estimates. (MoneyWeek; Institutional Investor)
• Reported profit on the subprime trade: roughly $500 million for the fund. Reported estimate. (MoneyWeek)
• Bear Stearns warning meeting: September 2006, with chief risk manager Bobby Steinberg and trading and risk heads. (FCIC testimony)
• Counterparty move: attempted to shift a large subprime derivative position away from Bear Stearns on March 11, 2008. (FCIC interview records)
• Public testimony: US House Financial Services subcommittee, 2007; FCIC first public hearing, January 13, 2010; FCIC staff interview, April 26, 2010. (FCIC final report notes; FCIC archive)

Aftermath

Bass was never accused of any wrongdoing in connection with the trade. He had bet against the bonds, not misrepresented them, and the FCIC treated him as one of several investors who saw the crisis building and positioned for it. His warnings to Bear Stearns and to a Federal Reserve board member in 2006 became part of the public record through his sworn testimony.

The very large 2007 return did not repeat. Reporting on Hayman's later years describes far more modest results once the subprime trade was closed, with one account citing roughly 1.56 percent annualized returns for the master fund over 2007 to 2015. Bass himself shifted from event-driven bets toward a global macro style focused on countries and sovereign balance sheets, and his assets under management were reported around $2 billion in the years after the crisis.

His later macro calls drew attention but had mixed outcomes. He was among the early voices warning that Greece could default on its debt, a call broadly vindicated by the European sovereign-debt crisis. His best-known later thesis was a long-running bet against Japanese government bonds and the yen, anticipating a debt or inflation crisis; despite a major move in the yen, the wholesale Japanese debt blowup he warned of did not arrive on the timetable he expected. In 2015 he turned to a different strategy entirely, challenging pharmaceutical patents through the Coalition for Affordable Drugs. He has remained a public commentator on global macro and geopolitics, including testifying and writing on China.

Unlike the parallel stories told in Michael Lewis's "The Big Short," Bass's bet is documented mostly through his own congressional and FCIC testimony rather than a single famous book. That makes the contemporaneous record unusually clear on what he argued and when, even where the precise profit and return figures rest on press reporting rather than audited disclosure.

Lessons for Investors

1. Stress-test the optimistic case, not just the crash case. Bass's key realization was that the mortgage bonds would lose money even if house prices only went flat. He did not need a dramatic collapse for his thesis to work. When you analyze a position, ask what happens in the merely disappointing scenario, not only the disaster, because that middle case is often the one the market is mispricing.

2. Understand where losses land in a structure. The reason flat prices mattered so much was the tranche structure: the first losses fell on the lowest-rated pieces and climbed upward. A small loss rate on the pool could erase the bottom layers entirely. If you own or short a structured product, know the order in which it absorbs losses before you trust its rating.

3. A correct call can be ignored by the people it should scare most. Bass walked his thesis into Bear Stearns and a Federal Reserve board member in 2006 and was waved away each time. Being right is not the same as being heard. Do not assume that institutions closest to a risk have priced it, because incentives and consensus can keep them from acting.

4. Know your counterparty when your gain is someone else's loss. Hayman tried to move its subprime position off Bear Stearns just before the firm failed. A derivative is only as good as the entity that owes you. When a trade pays off because the world is breaking, the people who owe you money may be breaking too, so counterparty risk is part of the trade.

5. Judge a manager across cycles, not by one historic year. Hayman's reported 200-plus percent in 2007 came from a rare, once-in-a-generation setup, and later years were far quieter. Several of Bass's subsequent macro calls were early or did not play out on schedule. Weigh any track record across many independent decisions, not by the single bet that made the headlines.

Frequently Asked Questions

What was the Kyle Bass subprime short in simple terms? The Kyle Bass subprime short was his 2006 to 2008 bet that US subprime mortgage bonds would collapse, placed through credit default swaps that paid out when the loans defaulted. The trade reportedly made his fund, Hayman Capital, hundreds of millions of dollars.

Why did Kyle Bass think the housing market would crash? Bass studied the loan pools behind mortgage bonds and concluded the loans were so weak that the bonds would lose money even if house prices merely stopped rising. He calculated that roughly flat prices could cause 9 or 10 percent losses on the securitizations, enough to wipe out their lower-rated tranches.

How much money did Kyle Bass make on the subprime trade? Reported figures put Hayman's 2007 return at more than 200 percent, with estimates cited around 212 to 216 percent, and roughly $500 million in profit on the subprime bet. These are press-reported estimates rather than audited disclosures, so treat the exact numbers with caution.

Did Kyle Bass warn anyone before the crash? Yes. In sworn FCIC testimony he described presenting his housing thesis to Bear Stearns risk and trading managers in September 2006, and separately to a Federal Reserve board member, and being dismissed both times. He also testified as an expert witness before a US House subcommittee in 2007.

What is the main lesson from the Kyle Bass subprime short? The core lesson is that the most dangerous mispricings hide in the merely disappointing scenario, not the obvious disaster. Bass won because he saw that flat prices, not a crash, were enough to break the bonds, and because he understood how losses moved through their structure.

Sources

1. Financial Crisis Inquiry Commission. Official Transcript, First Public Hearing, Day 1, Panel 2 (Kyle Bass testimony). January 13, 2010. https://fcic-static.law.stanford.edu/cdn_media/fcic-testimony/2010-0113-Transcript.pdf
2. Financial Crisis Inquiry Commission. Memo of staff interview with Kyle Bass, Hayman Capital (Yale Program on Financial Stability archive). https://elischolar.library.yale.edu/ypfs-documents/6216
3. Financial Crisis Inquiry Commission. Interview of Kyle Bass, Hayman Capital, April 26, 2010 (Yale Program on Financial Stability archive). https://elischolar.library.yale.edu/ypfs-documents/6344
4. Financial Crisis Inquiry Commission. The Financial Crisis Inquiry Report, Notes (Bass testimony and interview citations). 2011. https://fcic-static.law.stanford.edu/cdn_media/fcic-reports/fcic_final_report_notes.pdf
5. Partridge, Matthew. The world's greatest investors: Kyle Bass. MoneyWeek, July 7, 2017. https://moneyweek.com/469582/the-worlds-greatest-investors-kyle-bass
6. Institutional Investor. Hedge Fund Manager Kyle Bass Declares War on Drug Prices. https://www.institutionalinvestor.com/article/2bsvamo70u9386q6xbmkg/portfolio/hedge-fund-manager-kyle-bass-declares-war-on-drug-prices
7. Raskin, Max. Interview with Kyle Bass. https://www.maxraskin.com/interviews/kyle-bass
8. Hoover Institution. Global Macro Investing and Geoeconomics with Hedge Fund Investor Kyle Bass. https://www.hoover.org/research/global-macro-investing-and-geoeconomics-hedge-fund-investor-kyle-bass

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.