The S&P 500 extended its record-setting run on Monday, powered by technology stocks and fresh enthusiasm around artificial intelligence, but Polymarket traders are leaning toward a lower open on Tuesday.

The S&P 500 closed up 0.26% at a record 7,599.96 on the first day of the month. The June 2 Polymarket contract implied a 48% probability that the index will open higher on Tuesday.

Why That Number Matters

The S&P 500 has now logged nine consecutive weekly gains and continues to push deeper into record territory, supported by strong momentum in artificial intelligence-linked stocks.

However, investors are also watching developments in the Middle East after Iranian state media reported that Tehran would halt communications with the U.S. through intermediaries and move toward fully blocking the Strait of Hormuz.

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