American International Group (AIG) reported third-quarter earnings that beat analyst expectations, even as the insurer absorbed a sharp increase in catastrophe losses. The results highlight how property-and-casualty insurers can offset storm damage with stronger investment returns and steady premium growth.
What happened
AIG's adjusted earnings came in at $2.06 per share, above the $1.89 that analysts had forecast, according to LSEG data. The beat was driven by two key factors: net investment income jumped 42.5% to $1.1 billion, and general insurance net premiums written rose 7% to $6.65 billion.
Those gains helped cushion the impact of catastrophe charges, which climbed to $283 million from $100 million a year earlier. The increase was largely tied to severe convective storms in North America—a category that includes damaging thunderstorms, hail, and tornadoes. As a result, underwriting income fell 29% to $564 million.
Two engines of insurance profits
For property-and-casualty insurers, earnings come from two distinct sources: underwriting and investing. Underwriting is the core business of collecting premiums and paying claims. Investing is what insurers do with the cash they collect upfront—money that sits in reserve until claims come due.
That pool of cash, often called "float," is typically parked in bonds and other fixed-income assets. When interest rates are higher, insurers benefit as older bonds mature and the proceeds are reinvested at more attractive yields. That's exactly what happened at AIG: the company's investment income grew even while storm losses climbed.
A key measure of underwriting health is the combined ratio, which compares claims and expenses to premiums earned. A ratio below 100 means the insurer is making money on its policies; above 100 means it's paying out more than it takes in. AIG's combined ratio rose to 91.3% from 86.8% a year earlier, but it remained comfortably below the breakeven line.
What it means for investors
AIG's results are a reminder that for insurers, investment income can be just as important as underwriting performance. In a higher-rate environment, the steady cycle of bond maturities and reinvestment can lift portfolio returns relatively quickly, providing a cushion against a rough claims quarter.
But there's a flip side. Investors may start viewing AIG's earnings as more sensitive to interest-rate moves and portfolio performance, not just the latest catastrophe season. If rates fall, that investment income boost could fade, leaving the company more reliant on underwriting discipline.
The company's premium growth of 7% suggests demand for coverage remains solid, which is a positive sign for the broader property-and-casualty sector. However, the rise in catastrophe losses—particularly from severe convective storms—highlights the growing volatility that climate-related weather events can bring to insurers' results.
For everyday investors, AIG's quarter offers a useful lesson: when evaluating an insurance stock, look beyond headline earnings and consider both the underwriting and investment sides of the business. A company can beat expectations even when its core underwriting weakens, as long as its investment portfolio performs well.
Looking ahead, analysts will likely watch whether AIG can maintain its premium growth and keep its combined ratio below 100, while also monitoring how its investment income responds to any shifts in interest rates. The company's ability to balance these two engines will be key to sustaining its earnings momentum.
