• The S&P 500 is on track for roughly 32% earnings growth in Q2, following a 30% surge in Q1, a rare back-to-back jump.
  • Bank of America warns growth could slow below 20% by Q1 2027 and to mid-teens for the full year, as tougher comparisons loom.
  • AI and cloud spending remain key supports, but the deceleration could pressure market returns in 2027.

A Historic Surge

The S&P 500 is delivering a blockbuster earnings season, with Q2 growth tracking at roughly 32% year-over-year, following a 30% jump in the first quarter. That marks a historically rare back-to-back surge, fueled by broad-based gains across sectors and outsized surprises in technology, energy, and materials. Health care, however, has shown some weakness in certain periods.

“We're seeing an earnings boom that’s hard to overstate,” said one equity strategist at a major bank, noting that the strength has helped push indices to record highs. The robust corporate profits have been a key driver of the market’s 2026 rally, but some analysts are already looking ahead with caution.

Deceleration Ahead

Bank of America is sounding a more cautious note, projecting that earnings growth could slow below 20% by the first quarter of 2027 and settle in the mid-teens for the full year. That would still be healthy, but the deceleration could create headwinds for equities. “Markets often struggle when earnings remain strong but start to decelerate,” the bank’s strategists wrote in a note to clients.

“The current pace is unsustainable,” said another analyst. “Tougher comparisons are unavoidable.”

AI and Cloud Spending as Supports

For now, the earnings momentum is being underpinned by robust AI and cloud spending, which continues to drive demand for chips, data centers, and software. Companies across the tech sector are reporting double-digit revenue growth, and forward guidance remains upbeat.

“AI is the gift that keeps giving,” said a portfolio manager at a large asset manager. “But the law of large numbers eventually kicks in.”

Outlook for 2027

As we head into the second half of 2026, the near-term upside from AI and cloud investments appears intact. Yet, the 2027 earnings trajectory faces tougher comparisons, and the potential slowdown could temper market returns. Investors may need to adjust expectations, as the tailwinds from the current boom begin to fade.

“We’re not calling for a recession or a bear market,” the Bank of America strategists emphasized. “But the days of 30% growth are likely numbered.”

Correction: An earlier version of this article incorrectly stated that health care showed persistent weakness; in fact, it was isolated to certain periods. The text has been updated.