The Federal Reserve raised its benchmark rate 0.25 percentage points to 3.75%-4.00% on September 16, its first hike since July 2023. Berkshire Hathaway holds $359.2 billion in cash and Treasury bills, a stockpile positioned to earn more as short-term yields rise.
But the boost is not yet visible in Berkshire’s books. Interest, dividend, and other investment income for the first half of 2026 came in slightly below the same period last year, even though the cash pile grew.
Why The Payoff Hasn’t Landed Yet
Berkshire’s cash and Treasury bill position, disclosed in its June 30 filing, has grown steadily since 2023, when it held roughly $146 billion, part of a rapid cash buildup that has drawn scrutiny from investors.
Higher rates lift that stockpile’s yield only as older bills mature and get reinvested at the new rate, a process that unfolds over months rather than instantly.
That lag likely explains why Berkshire’s first-half 2026 results, published August 8, showed little sign of a rate-driven income jump. Interest, dividend, and other investment income actually slipped slightly year over year, even as the underlying cash position expanded.
Net earnings more than doubled to $35.8 billion for the half, but that surge came mainly from unrealized gains on stock holdings, not cash income. Berkshire also kept spending during the quarter, including a larger stake in Alphabet, Google’s parent company, and other acquisitions, activity unrelated to the rate hike itself.
The Federal Open Market Committee, the Fed’s policy-setting body, has signaled it expects one more increase before year-end, and futures markets currently price an 87% chance of that happening.
If it lands, each new batch of maturing Treasury bills would roll over at a higher yield, gradually lifting Berkshire’s interest income further. Until then, the cash pile’s real payoff looks more like a bet on flexibility than a return already banked, one that depends as much on how Greg Abel deploys cash as on where rates go next.
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