July 31, 2026: Polymarket traders expect the S&P 500 to open higher on Friday after strong AI-driven earnings fueled a broad market rebound.
S&P 500 surged 1.66% Thursday on Microsoft +16% (Azure) and Amazon/Apple earnings; traders price 94% Friday rally probability. Meta's 91% FCF collapse versus Microsoft's gains exposes AI ROI divergence—reshaping CTO vendor selection and cloud budget priorities.
The S&P 500 rebounded sharply on Thursday as strong earnings from Microsoft Corp.
(NASDAQ:MSFT) and a broad rally in semiconductor stocks lifted investor sentiment following the previous session's selloff.
Polymarket traders now expect the benchmark index to extend those gains at Friday's open.
The S&P 500 rose 1.66% to close at 7,437.63, after opening at 7,390.45.
The July 31 Polymarket contract implied a 94% probability that the index will open higher on Friday.
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