S&P 500 Earnings Season Preview: Q3 2025

S&P 500 earnings estimates for the current third quarter have seen an unusual upward revision, increasing by 0.1% during the period to an expected 8.0% year-over-year growth, significantly deviating from historical trends where estimates typically decline. This optimism is further reinforced by a higher-than-average percentage of companies issuing positive EPS guidance and raised revenue estimates, now projecting 6.3% year-over-year growth. However, the forward 12-month P/E ratio of 22.8 stands above both 5-year and 10-year averages, indicating a premium valuation as the earnings season commences with 37 S&P 500 companies scheduled to report next week.

Analysis

The S&P 500 enters Q3 2025 earnings season with an unusually optimistic outlook, as estimated per-share earnings increased by 0.1% during the quarter, a significant deviation from the typical historical decline of 1.4% to 3.2%. This positive revision, coupled with 49% of companies issuing positive EPS guidance (well above historical averages), points to robust underlying corporate performance.

Current projections forecast 8.0% year-over-year earnings growth for Q3 2025, up from 7.3% at the quarter's start, potentially marking the ninth consecutive quarter of growth. Revenue estimates also rose to 6.3% year-over-year growth, the second-highest since Q3 2022. Information Technology, Utilities, Materials, and Financials are leading earnings growth, while Energy and Consumer Staples show declines.

Despite this strong operational outlook and projected continued earnings growth through 2026, the S&P 500's forward 12-month P/E ratio is 22.8. This valuation stands notably above the 5-year average of 19.9 and the 10-year average of 18.6, suggesting that much of the positive sentiment may already be priced in.

Key Decisions for Investors

• Investors should recognize the unusual strength in Q3 2025 earnings and revenue estimates, which defy historical patterns of downward revisions.
• However, the elevated forward 12-month P/E ratio of 22.8 suggests that this optimism is largely priced in, warranting caution regarding broad market upside.
• Focus on sector-specific performance, particularly in Information Technology and Financials for growth, while closely monitoring actual results from the 37 S&P 500 companies reporting next week for confirmation of these positive trends.