Treasury Bill Rollover & Reinvestment at Berkshire Hathaway

Berkshire Hathaway has assembled an unprecedented sovereign-scale cash hoard, positioning itself as one of the largest non-bank holders of United States government debt. Portfolio forensic tracking in the Warren Buffett 277 billion cash market crash playbook breaks down how Warren Buffett systematically rolls 3-month and 6-month Treasury bills.

By purchasing short-dated Treasury bills directly at weekly primary Treasury auctions, Berkshire avoids duration risk while clipping over 5% annualized risk-free yields. This cash ladder generates billions of dollars in quarterly pre-tax interest income, expanding cash balances even as broader equities trade at rich valuation multiples.

This fortress liquidity buffer ensures that Berkshire maintains unrivaled capital deployment optionality, allowing Buffett to act as the lender and equity partner of absolute last resort during sudden credit market freezes or severe stock market corrections.