Earnings season: AI capex meets the cost of capital

The market review highlights a shift in tone this earnings season: while investors previously welcomed almost any announced plan to expand AI infrastructure, the focus is now shifting toward the actual profitability of these investments. The rising cost of capital — both debt and equity — is pushing the market to scrutinize the payback periods of hyperscalers' and chipmakers' massive capex more rigorously. Companies unable to clearly link data-center spending to future revenue are facing a more skeptical investor reaction even when overall financial results are strong. Analysts note that this shift reflects a more mature phase of the AI cycle, where speculative enthusiasm is giving way to demands for capital discipline. For retail investors, this is a signal to look more closely not just at revenue growth rates of tech companies, but also at how efficiently they deploy capital.