Finance · Profile from Finance Research Companion
MBIA
For three decades the largest US "monoline" bond insurer, a company that rented its triple-A rating to cities, hospitals, toll roads and, increasingly, Wall Street securitisations, guaranteeing that bondholders would be paid if the issuer could not. Formed in 1973 as the Municipal Bond Insurance Association by a consortium of big insurers, it guaranteed several hundred billion dollars of debt at its peak. Bill Ackman's Gotham Partners attacked it in 2002 with a report titled "Is MBIA Triple-A?" and was investigated for his trouble; five years later MBIA's guarantees of mortgage-backed CDOs produced billions of dollars of losses, the rating agencies stripped its triple-A in June 2008, and the bond-insurance business model collapsed. In February 2009 MBIA split its US municipal guarantees into a new company, National Public Finance Guarantee, triggering four years of litigation with banks that held its structured-finance policies. National stopped writing new business in 2017 and has spent the decade since running off its book and fighting Puerto Rico's power authority, PREPA, in bankruptcy court. By mid-2026 National's insured book had shrunk to ~$20.8bn, and MBIA Inc. reported a negative book value and an open strategic review.
At a glance
- Founded
- 1973, as the Municipal Bond Insurance Association, an association of insurers (company history names Aetna Casualty and Surety, St. Paul, Aetna Insurance (later part of CIGNA) and US Fire (Crum & Forster); other sources list Fireman's Fund, Travelers and Continental; verify membership)
- Corporate form
- MBIA Inc. and MBIA Insurance Corporation formed in 1986 with ~$427m of initial capital from member companies (company history); IPO 1987 (verify month)
- Headquarters
- Purchase, New York (formerly Armonk, New York)
- Ownership / structure
- Public company (NYSE: MBI). Main subsidiaries: National Public Finance Guarantee Corporation (US public finance, in run-off since 2017) and MBIA Insurance Corporation ("MBIA Corp", structured finance and international, in run-off since 2008)
- Leadership (2026)
- William C. Fallon, CEO (since 2017, verify); Joseph "Jay" Brown, former CEO (1999–2004 and 2008–2017) (verify); Anthony McKiernan, CFO (verify)
- Business
- Financial guarantee insurance (no new business): pays principal and interest on insured bonds if the issuer defaults, then seeks recovery
- Scale
- Peak insured net par ~$670bn (2007, verify), including ~$537bn of US public finance at September 30, 2008 (company). National gross par outstanding ~$22.3bn at end-2025 and ~$20.8bn at June 30, 2026; National statutory capital ~$968m; claims-paying resources ~$1.4bn (Q1 2026) (company)
- Financials
- 2025 GAAP net loss ~$177m (~$(3.58) per share); adjusted net income ~$23m; book value per share ~$(44.27) at December 31, 2025, depressed by consolidation of MBIA Corp's deficit (company, February 2026)
- Regulatory status
- National is a New York-domiciled financial guarantee insurer regulated by the New York Department of Financial Services (verify domicile); MBIA Corp also NYDFS-regulated
- Signature moves (incl. failures)
- Founding as an insurer pool (1973); incorporation, IPO and the triple-A franchise (1986–87); the AHERF loss and the reinsurance accounting scandal (1998, settled 2007); Ackman's short campaign (2002); the push into structured finance and CDO guarantees (2004–07); the 2008 downgrades and capital raise; the National split and bank litigation (2009–13); the Bank of America settlement (2013); Puerto Rico, PREPA and run-off (2017–26)
9 strategic moves analysed
Each one gets a full strategy file in the companion: context, the decision, the financing, what happened, and the lesson.
1973
Municipal Bond Insurance Association Founded
Founding
1986
Incorporation IPO and the Triple A Franchise
Restructuring / IPO
1998
AHERF Loss and Reinsurance Accounting
Regulatory settlement (accounting)
2002
Ackman Short Is MBIA Triple A
Controversy (short-seller campaign)
2004
Structured Finance and CDO Guarantees
Pivot (product expansion)
2008
Downgrades and the Loss of Triple A
Failure (of the business model) / capital raise
2009
National Public Finance Split and Bank Litigation
Restructuring
2013
Bank of America Settlement
Settlement
2017
Puerto Rico PREPA and Run Off
Run-off / restructuring