Stock market crash guide - EQOS Asia

The Lehman Brothers collapse: the day the 2008 crisis went global

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The essentials in 30 seconds

  • Lehman Brothers filed for Chapter 11 on Monday 15 September 2008, after 158 years in business.
  • The firm held about $680 billion of assets against roughly $22.5 billion of capital.
  • The EQOS Asia 2008 back-test lists leverage of 30.7 to 1 and a bankruptcy threshold of 3.3%.
  • The Dow closed down 4.4% on the day of the filing.
  • Three detailed pages cover the bankruptcy, the causes, and Richard Fuld.

The Lehman Brothers collapse of 15 September 2008 is the day the crisis went global. A US investment bank with 158 years of history filed for Chapter 11, and funding markets around the world stopped working within days. As of October 2026 this page tells the story in order and uses the EQOS Asia 2008 back-test to show what the public data said in 2006 and 2007. It belongs to the 2008 financial crisis timeline.

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Where did Lehman Brothers come from, and how did it make money?

Lehman Brothers was founded in 1850 in Montgomery, Alabama, and operated for 158 years with about 25,000 employees worldwide (Wikipedia). It grew into one of the largest US investment banks, earning fees from trading, advice, and the packaging of loans into securities. Its name stood for stability and for long relationships with major clients.

The firm also owned mortgage lenders. It bought Aurora Loan Services, an Alt-A lender, in 1997 and BNC Mortgage, a subprime lender, in 2000. By 2006 the 2 units were lending almost $50 billion per month. Lehman therefore produced mortgage loans and kept large positions in them, which tied its fate to the housing market.

How leveraged was Lehman Brothers when the collapse came?

In 2008 Lehman held about $680 billion of assets supported by roughly $22.5 billion of capital, and its ratio of assets to equity rose from about 24 to 1 in 2003 to 31 to 1 in 2007 (Wikipedia). The EQOS Asia 2008 back-test (2026) lists 30.7 to 1 from the 10-K filing and a bankruptcy threshold of 3.3%.

At that ratio a drop of 3.3% in asset values erases the equity. The reasons behind this exposure, including mortgages and the Repo 105 accounting, are set out on the page why did Lehman Brothers fail. Leverage explains why the firm had so little room to absorb the losses that arrived in 2008.

Four Lehman Brothers figures: assets 680 billion dollars, capital 22.5 billion, leverage 31 to 1, and a bankruptcy threshold of 3.3 percent
Key figures of the Lehman Brothers balance sheet in 2008.

What happened to Lehman Brothers in the weeks before 15 September 2008?

On 9 June 2008 Lehman announced a loss of $2.8 billion, its first since the spin-off from American Express (Wikipedia). On 9 September its shares fell 45% to $7.79 after talks with a South Korean investor were reported on hold. The next day it announced a $3.9 billion loss and plans to sell a majority of its investment management business.

Talks with Bank of America and Barclays ended over the weekend of 13 and 14 September without a buyer. The Treasury rejected Bank of America’s terms, so that bank bought Merrill Lynch instead, and regulators in the United Kingdom vetoed the Barclays deal on 14 September. Lehman had run out of partners within 5 days.

Five dates from June to September 2008 leading to the Lehman Brothers filing
The path to the Lehman Brothers filing in 2008.

How large was the Lehman Brothers bankruptcy in September 2008?

Lehman Brothers filed for Chapter 11 on Monday 15 September 2008 in the US Bankruptcy Court for the Southern District of New York. Reports of the filing cite $613 billion of bank debt and $639 billion of assets (Wikipedia), while the study lists $619 billion of debt, the largest default in history at that date (EQOS Asia 2008 back-test, 2026).

The detailed account of the filing, the creditors, and the size comparison with earlier bankruptcies sits on the Lehman Brothers bankruptcy page. For this overview, the key point is the scale. A failure of this size touched banks, funds, and companies in dozens of countries, which explains why the crisis went global that week.

How did the Lehman Brothers collapse spread across the global markets?

The Dow closed down just over 500 points, or 4.4%, on 15 September 2008 (Wikipedia). The Reserve Primary Fund, a money market fund, fell below $1 per share after losses on $785 million of Lehman commercial paper, the first such drop since 1994. Money market funds supply short-term cash to firms, so the shock reached companies outside finance.

Barclays agreed to buy core North American assets in a revised deal of $1.35 billion approved on 20 September, and Nomura agreed to buy the Asia-Pacific franchise for $225 million. The sales moved Lehman’s businesses to new owners across 3 regions. Banks in Singapore and Hong Kong could feel the shock through funding and trade channels.

What role did Richard Fuld play in the Lehman Brothers collapse?

Richard S. Fuld Jr. served as chairman and chief executive of Lehman Brothers from 1 April 1994 until 15 September 2008 (Wikipedia). He testified before the US House Oversight Committee on 6 October 2008. The page on Richard Fuld and Lehman covers his decisions in the last year, including talks with investors and the choices that shaped the final weekend.

Public documents are the right basis for any judgement on individuals. The court-appointed examiner Anton R. Valukas released his report on 11 March 2010, and it describes the facts that investors and regulators can use. This overview keeps to the documented events and leaves the assessment of any person to those sources.

What did public data show before the Lehman Brothers collapse?

The study applies its Codex to public data from 2006 and 2007 and finds a φ(S) score of 0.234 for the global financial system, with 6 of 9 dimensions in the critical zone. It also projects the point of no return at about 1.1 year after mid-2006, a window that ends before Lehman fell (EQOS Asia 2008 back-test, 2026).

The score is a measurement that you can recompute from SEC, BIS, FDIC, and Case-Shiller data. The EQOS Asia method page explains the 9 dimensions, and the Λ simulator lets you estimate a score for your own exposure in 10 minutes. A 30-minute pre-diagnostic with the team applies the same reading to your portfolio or business.

Frequently asked questions

When did Lehman Brothers collapse?

Lehman Brothers filed for Chapter 11 on Monday 15 September 2008 in the US Bankruptcy Court for the Southern District of New York. The firm had operated for 158 years. The filing came after talks with Bank of America and Barclays ended over the weekend without a buyer.

Why did the Lehman Brothers collapse turn the crisis global?

Lehman was linked to banks, funds, and companies in many countries. After the filing, the Reserve Primary Fund fell below $1 per share, which hurt money markets that firms use for daily cash. Barclays and Nomura bought its businesses in North America and Asia-Pacific, which shows the global reach.

How leveraged was Lehman Brothers?

In 2008 Lehman held about $680 billion of assets with roughly $22.5 billion of capital. Its ratio of assets to equity rose from about 24 to 1 in 2003 to 31 to 1 in 2007. At that level a drop of 3.3% in asset values would erase the equity.

What did the EQOS Asia back-test say about the period?

The EQOS Asia 2008 back-test computed a φ(S) score of 0.234 for the global financial system on public data from 2006 and 2007, with 6 of 9 dimensions in the critical zone. It lists Lehman leverage at 30.7 to 1 and a bankruptcy threshold of 3.3%.

Test your knowledge

1. On which date did Lehman Brothers file for Chapter 11?

  • 7 September 2008
  • 15 September 2008
  • 3 October 2008
Show the answer

15 September 2008.

2. How many years had Lehman Brothers operated by 2008?

  • 158 years
  • 25 years
  • 75 years
Show the answer

158 years.

3. How far did the Dow close down on 15 September 2008?

  • 0.4%
  • 2.1%
  • 4.4%
Show the answer

4.4%.

4. Which firm bought Lehman’s Asia-Pacific franchise for $225 million?

  • Barclays
  • Nomura
  • JPMorgan
Show the answer

Nomura.

5. Which bankruptcy threshold does the study list for Lehman?

  • 3.3%
  • 7%
  • 20%
Show the answer

3.3%.

About the author

Portrait of Stéphane Jambu

Stéphane Jambu

President, EQOS Forecast Asia

Stéphane Jambu leads EQOS Forecast Asia and works as a consultant in e-commerce, search visibility, and AI. LinkedIn profile

Sources: EQOS Asia 2008 back-test (eqos-asia.com/case-studies/crise-2008.html), method page (eqos-asia.com/method.html), simulator (eqos-asia.com/simulator.html) and contact page (eqos-asia.com/contact.html), Wikipedia articles on Lehman Brothers (en.wikipedia.org/wiki/Lehman_Brothers), Bankruptcy of Lehman Brothers (en.wikipedia.org/wiki/Bankruptcy_of_Lehman_Brothers) and Richard S. Fuld Jr. (en.wikipedia.org/wiki/Richard_S._Fuld_Jr.), consulted on 22 October 2026. Page updated on 22 October 2026.