Retroactive Reinsurance

Retroactive reinsurance is a specialized insurance structure in which Berkshire Hathaway agrees to cover losses that have already occurred, but whose full magnitude is not yet known — in exchange for an immediate, upfront cash or asset transfer. It is the most sophisticated expression of Berkshire's Float strategy, extending the investment horizon to decades and producing float with a negative cost if underwriting losses are correctly priced.

The Core Logic

In a conventional reinsurance contract, the reinsurer takes on future risk in exchange for a premium paid now. In retroactive reinsurance:

• The insured event has already happened (e.g., asbestos exposure, pollution, product liability).
• The total cost is highly uncertain — claims may emerge over 20, 30, or 50+ years.
• Berkshire receives cash/assets today and promises to pay those future claims up to a stated limit.

The immediate receipt of assets creates float — capital Berkshire can invest for decades before paying out. If investment returns over that period exceed the eventual claims, the deal is profitable even if Berkshire pays every dollar of the stated limit.

The Equitas Deal (2006) — The Definitive Case Study

In 2007 (announced/structured in 2006), Berkshire struck the largest retroactive reinsurance deal in history:

• Counterpart: Equitas — the Lloyd's of London vehicle created to ring-fence all pre-1993 Lloyd's policies.
• Structure: Berkshire agreed to cover all future claims on those policies up to $13.9 billion.
• Berkshire received: $7.12 billion in cash and securities immediately.
• Implied cushion: $5.7 billion above Equitas's estimated total liability — but the actual liability could exceed estimates.
• Liability profile: Asbestos, pollution, product liability claims from events that occurred before 1993. Some claims will not be settled until 2050 or beyond.
• CEO of Equitas, Scott Moser: "Names wanted to sleep easy at night, and we think we've just bought them the world's best mattress."

Why Only Berkshire Can Do This

Retroactive reinsurance at this scale requires three things that almost no other institution possesses simultaneously:

1. Absolute financial strength: The counterparty must be certain Berkshire will exist and can pay in 50 years. Only a company of Berkshire's size and balance-sheet conservatism can make that guarantee credibly.
2. Investment skill: The float must compound faster than the claims grow. Average companies should not attempt this; Berkshire, with Ajit Jain designing the structures and Buffett deploying the assets, is uniquely positioned.
3. Long-duration patience: Most insurance companies report quarterly and cannot absorb the accounting volatility of amortizing a $7B deferred charge over 50 years. Berkshire's owner-orientation makes this irrelevant.

The Accounting: DCRA Amortization

Under retroactive reinsurance accounting:

• Berkshire records the cash received as a liability.
• It records a Deferred Charge on Retroactive Agreements (DCRA) as an asset — representing the time value of money on the float.
• The DCRA is amortized over the estimated life of the claims, producing an ongoing accounting charge.
• The Equitas deal is expected to add ~$450M/year in DCRA amortization, raising the bar that Berkshire's other insurance operations must clear for overall float to remain cost-free.

Historical Context

Berkshire has written several large retroactive reinsurance deals since the 1990s, generally through Ajit Jain's Berkshire Hathaway Reinsurance Group. By 2006, the cumulative DCRA asset had at times reached $3 billion. Equitas brought it to a new level entirely.

• Related Concepts: Float, Insurance Principles, Super-Cat Insurance, Experience vs Exposure
• Related Entities: Ajit Jain, General Re, Berkshire Hathaway Inc.
• Key Event: Equitas (2006–2007)
• References: 2006 Letter, 2006 Meeting
• Index: index