Rising rates lift Chubb's new-money yield and cut its book value in the same quarter

Chubb, the commercial and specialty insurer, collects premiums long before it pays claims and invests the money in between, mostly in investment-grade bonds. In the September 2026 quarter, rising interest rates reached that portfolio from two sides. New money is now going in at an average 6.2%, against a 5.2% yield on the fixed-income book. The same rise in rates lowered the market price of bonds Chubb already owns, and after-tax realized and unrealized losses of $4.48 billion in the portfolio came off book value over the three months.

The gap between those two yields is what changes the income outlook. The quarter before, new money earned 5.5% against a 5.1% book yield, a spread of 0.4 point; it is now a full point. As older bonds mature and the cash is reinvested, the book yield drifts toward the new-money rate, so investment income can rise without Chubb writing more insurance. Chief executive Evan Greenberg made the matching argument about the loss: "Given our duration and higher reinvestment rates, the mark will amortize away reasonably quickly." A bond held to maturity is repaid at face value, so its price discount shrinks as repayment nears.

The cost is already on the balance sheet. Book value per share ended the quarter at $191.43, down from $195.45 three months earlier, even though the business made an operating profit in the quarter. It had risen in the quarter before that, so this measure can swing by several dollars a share from one quarter to the next. Chubb also reports a measure that strips the swing out. Tangible book value per share excluding AOCI (accumulated other comprehensive income, the part of equity that holds unrealized bond gains and losses along with currency effects) rose 15.4% from a year earlier; as reported, with the mark included, it rose 5.7%.

That distinction matters for the outlook management gives. In February, Greenberg said that, catastrophes and currency aside, Chubb could deliver double-digit growth in both EPS and tangible book value for the year. In July Greenberg said his outlook statement was not guidance, that it had broadened the range of outcomes modestly, and that EPS growth could still be very strong and potentially double-digit. This time he put it over the medium term: "strong growth in operating earnings and EPS, and most important, double-digit growth in tangible book value." Last quarter's growth clears that bar on the basis the company highlighted this quarter, excluding AOCI, and falls short of it as reported.

The quarter's earnings show why book value carries the emphasis. Core operating EPS rose 0.8% while core operating income fell, as catastrophe losses came in at more than twice the year-earlier level. The per-share gain came from a weighted average share count 2.9% smaller, calculated from the reported share figures. Premiums are not supplying much growth either: P&C net premiums written rose 1.9%, and North America Commercial shrank 2.7% after Chubb declined to renew some large-account property and financial-lines business and bought more reinsurance. Greenberg said he expects that segment's growth to improve materially in future quarters.

That leaves investment income carrying more of the load. Adjusted net investment income was a record, but its growth slowed to 6.3% from a year earlier, from more than 11% the quarter before; the year-on-year figure was held back by private-equity partnerships, whose income fell to $97 million from $127 million a year earlier. Chubb gave a quarterly range for this line as recently as April. Asked about it this time, finance chief Peter Enns said "we're not providing specific guidance."

The two effects of higher rates therefore keep different timetables. The loss is already counted in book value, while the extra point of yield reaches earnings only as bonds mature and the money is reinvested. That is why the company's measure excluding AOCI and the reported one were almost ten points apart last quarter, by our arithmetic, and why the gap would narrow if rates stop rising while the portfolio turns over.