S&P 500 (SPX) Up or Down on April 21?

This market will resolve to "Up" if the official S&P 500 Index closing price for S&P 500 (SPX) on Tuesday, April 21, 2026 is higher than the official S&P 500 Index closing price for SPX on the most re...

Vol 24h: $310.0K Total: $312.5K Liq: $321.7K Ends: 2026-04-21 Trade on Polymarket →

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