Microsoft, Alphabet, and Amazon Make Up About 15% of the S&P 500. All 3 Report Earnings Within 2 Days.
Key PointsThe S&P 500 is up around 12% so far in 2026.
Microsoft, Alphabet, and Amazon collectively account for approximately 15% of the S&P 500 index. These three companies are set to release their quarterly earnings results within two days of each other, on October 28th, 29th, and 30th. Despite contributing significantly to the index, these companies have underperformed compared to others like Apple and Nvidia.
If these three stocks had simply matched the overall market performance, the S&P 500 fund would have gained nearly 13% instead of the 12% it did. The fund's composition has already shifted slightly, with these three companies now comprising around 15% of the index, down from 15.6% at the end of 2025. While individual reactions to their earnings reports could sway the fund's value by a small percentage, the overall impact is likely to be minimal.
Nonetheless, the weight of these tech giants in the index underscores the potential volatility that can stem from their earnings announcements.
Written by urgent.news from Motley Fool's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
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