Corporate profits in the United States reached record levels in the first quarter of 2026, with net profit margins hitting 15%, the highest since data tracking began in 2009, according to FactSet. This surge has bolstered investor confidence in the equity market despite elevated stock valuations.

The net profit margin, which measures the profit generated from every dollar of revenue, rose sharply from 13.2% in the previous quarter. Growth extended beyond the technology sector, with financial services and industrial companies also reporting margins above their five-year averages. Excluding technology, the S&P 500’s net profit margin stood at 12% for the period.

Analysts attribute this strength to improved productivity across sectors, partly driven by advances in artificial intelligence and other emerging technologies. “This is a productivity-driven environment, much like the ’90s were,” said Nancy Tengler, CEO of Laffer Tengler Investments.

Within the technology sector, companies such as Nvidia and Micron Technology have significantly contributed to margin expansion. However, the AI space presents a mixed picture: chip makers and infrastructure providers are gaining robust profits, while some hyperscale cloud operators face margin pressure due to heavy capital expenditures.

Overall, earnings growth for S&P 500 companies soared by 29% in the first quarter, marking the fastest pace since late 2021. Expectations for the second quarter remain optimistic, with analysts projecting a net profit margin of approximately 14%. This would still surpass both the prior year’s 13% margin and the five-year average of 12%, though it would fall short of the first quarter’s record.

Some companies have raised prices to counter rising input costs. For example, Apple’s CEO Tim Cook noted that price increases in its products have helped offset higher expenses for memory and storage components.

Concerns persist regarding the durability of these profit margins. The concentration of growth in the technology sector means that any shifts in pricing power or demand could lead to rapid earnings declines. OpenAI, for instance, is reportedly considering cutting prices to compete with rival Anthropic, potentially impacting margins within the AI industry.

Matt Miskin, co-chief investment strategist at Manulife John Hancock Investments, warned that changes in semiconductor demand or pricing dynamics could cause significant reversals in profitability.

Despite strong earnings, stock valuations remain elevated, with the S&P 500 trading at around 20 times projected earnings for the next 12 months, above the decade-long average of 19. Additional pressure on margins could come from tightening financial conditions and rising borrowing costs as the Federal Reserve signals possible interest rate increases to maintain inflation control under new Chairman Kevin Warsh.