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Q: What is "float" in insurance?

A: When you pay for insurance, the company doesn't pay claims immediately. It holds your premium and invests it until a claim comes due — sometimes years later. That pool of held money is called "float."

Q: Why does Buffett love it so much?

A: Because if you underwrite well, your float can be cost-free or even *negative cost* — meaning you get paid to hold and invest other people's money. Berkshire has used this float to buy stakes in Coca-Cola, Apple, and dozens of other companies.

Q: Isn't that just... using other people's money?

A: Basically, yes. Banks do something similar with deposits. The difference is insurance float doesn't have to be paid back on demand — policyholders only get paid when they file a claim, which gives Buffett a longer, cheaper runway to invest.

Q: How much float are we talking about?

A: Berkshire's insurance float has been in the tens of billions of dollars for years, generated mainly through GEICO and Berkshire Hathaway Reinsurance.

Q: Can a regular person "use" this idea?

A: Not literally (you can't run an insurance company from your bedroom), but the underlying lesson applies: money you can access cheaply and hold for a long time, invested wisely, compounds a lot faster than money you have to pay back quickly. That's the core takeaway people usually apply to things like low-interest debt or long-term investing.

Q: Is this a loophole or is it well known?

A: It's completely public — Buffett explains it every year in Berkshire's shareholder letters. It's not a secret so much as something most people never think about because it doesn't apply to individuals directly.

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