Insurance Float
Premiums collected upfront but paid out later, creating "float" that Berkshire invests at high returns — the foundation of Berkshire's capital advantage.
Insurance Float
Insurance float is money that insurance companies collect in premiums upfront but hold until claims are paid out later. This creates a pool of capital — the "float" — that can be invested until needed to pay claims. For Berkshire Hathaway, float has become the foundation of its capital allocation advantage.
How Float Works
The Mechanics
Collect Premiums → Hold as Float → Invest in Securities → Pay Claims Later
[Upfront] [Years later] [Earn returns] [When due]
The Beautiful Business
"Insurance float is a unique structural advantage that lets us invest other people's money at high returns."
Key insight: If float can be held at low or zero cost (through profitable underwriting), the investment returns on that float are essentially pure profit.
Berkshire's Float History
Growth Trajectory
| Year | Float ($B) | Notes |
|---|---|---|
| 1970 | $0.039 | Early days |
| 1980 | $0.237 | Growing |
| 1990 | $1.6 | Steady |
| 2000 | $27.9 | Major growth |
| 2008 | $58.5 | Through crisis |
| 2010 | $65.8 | Recovering |
| 2018 | $122.7 | Massive scale |
$122.7 billion in float by 2018 — all invested at high returns.
The Underwriting Profit Key
When Float is Free
Buffett's goal is negative cost float — not just free float, but being paid to hold it:
| Year | Underwriting Profit ($B) | Float Cost |
|---|---|---|
| 2007 | $3.4 | 实际上我们在赚钱 |
| 2008 | $2.8 | Again profitable |
| 2016 | ~$1B+ | 14th consecutive year |
"In 2008, we were paid $2.8 billion to hold our float."
The Insurance Trisect
Berkshire's three insurance engines:
| Company | Float (2008) | Role |
|---|---|---|
| GEICO | $8.5B | Direct auto, 7.7% market share |
| General Re | $21.1B | Global reinsurance |
| BH Reinsurance (Ajit) | $24.2B | Large casualty risks |
Combined float: $58.5 billion (2008)
Why Float is a Moat
Structural Advantages
- Capital Access — Float provides cheap capital for acquisitions
- Scale Advantage — Larger float = more investment firepower
- No Dilution — Float doesn't require issuing equity
- Perpetual — Insurance operations continuously generate new float
Compounding on Float
Buffett reinvests float returns:
- Equities that compound at 10-20% annually
- Acquisitions funded by float returns
- No pressure to distribute to shareholders
"Float is the basis of Berkshire's permanent capital advantage."
Famous Quotes
"Our insurance business delivers funds that cost us less than nothing."
"Over time, the float has become more valuable than the insurance operations themselves."
Related
- berkshire-hathaway — Where float is deployed
- geico — Core float generator
- capital-allocation — How float is invested
- compounding — Reinvestment returns
- moat — Float as competitive advantage