Berkshire Hathaway: Capital Allocation as the Job
Featuring Warren Buffett, Charlie Munger
Berkshire Hathaway began as a failing textile company. Warren Buffett took control in the mid-1960s, slowly realized the textile business was a poor use of capital, and shut it down, replacing it with something stranger: a capital allocation machine. The engine was insurance. Companies like GEICO collected premiums before paying claims, and the gap, the "float," became an effectively interest-free loan Buffett could invest. For decades that float wasn't just free, it was profitable, and he and Charlie Munger deployed it into businesses that compounded book value past the S&P 500 for most of the company's history.
Most operators pour their energy into running the business they have. This case argues the higher-leverage decision is what you do with the cash it throws off, a decision most companies make by default rather than design. It sharpens how founders should think about where their capital actually goes, and it leaves the discipline behind Buffett's deployment choices for the reader to uncover.
Frequently asked questions
What is the Berkshire Hathaway capital allocation case about?
It is about how Warren Buffett turned a failing textile company into a capital allocation machine. After taking control in the mid-1960s, Buffett shut down the textile business and built an engine around insurance, using the float from companies like GEICO as a low-cost source of capital to invest, compounding book value past the S&P 500 for most of the company's history.
What is insurance float and how did Buffett use it at Berkshire?
Float is the gap between when an insurer collects premiums and when it pays out claims, which functions like an effectively interest-free loan. Companies like GEICO collected premiums before paying claims, and Buffett invested that float into businesses that compounded value. For decades the float was not just free but profitable, because the underwriting itself made money.
Why was capital allocation the key to Berkshire's success?
Because Buffett treated deciding what to do with the cash a business throws off as the highest-leverage job, not running any single business. Most companies make that decision by default rather than design, but Buffett and Charlie Munger deployed Berkshire's insurance float deliberately into compounding businesses, which drove returns ahead of the market.
What can operators learn from Berkshire Hathaway about capital allocation?
Where your cash goes can matter more than how you run the business that generates it, so treat capital allocation as a deliberate decision rather than a default. Buffett's discipline was in choosing where to deploy float, and knowing when a business, like the original textiles, is a poor use of capital. CaseBook turns this into a move you apply to your own company, with an AI coach that reads your answer.