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Jun 10, 2026 4:40 AM

Stock Market: Will S&P 500 Open Up Or Down Today?

The S&P 500 fell on Tuesday as weakness in semiconductor stocks continued and investors weighed geopolitical uncertainty in the Middle East. Polymarket traders are now betting the benchmark index will open lower on Wednesday.

The S&P 500 declined 0.26% to close at 7,386.65 on Tuesday after giving up early gains. The June 10 Polymarket contract implied just a 22% probability that the index will open higher on Wednesday, signaling a strongly bearish outlook among traders.

Why That Number Matters

Markets are facing a combination of rising geopolitical tensions and inflation concerns.

The U.S. launched “self-defense strikes” against Iran late Tuesday after Washington accused Tehran of shooting down a U.S. Army Apache helicopter over the Strait of Hormuz. The latest escalation threatens the fragile ceasefire ...