Gains in AI company stakes juice second-quarter earnings for S&P 500

The second quarter of 2026 is proving to be a strong earnings season for S&P 500 companies, largely driven by surging profits at AI-related firms. The S&P 500 is projected to see a 52% increase in aggregate earnings from the previous year, with a 74% jump in profits for the technology sector contributing significantly to this growth.

Major players Alphabet and Amazon recognized substantial gains from their investments in AI start-ups such as Anthropic, leading to large mark-to-market boosts. Although excluding these gains, the estimated quarterly profit growth for the S&P 500 stands at 33%, still representing the strongest quarter since 2021. However, investors caution that mark-to-market gains can be volatile and may amplify the impact of market fluctuations on a company's performance.

Despite this, optimism about AI-related companies continues to uplift Wall Street, but there is growing concern over elevated valuations and risky financial practices like circular financing.