S&P 500 (SPX) Opens Up or Down on April 22?

This Polymarket asks whether the S&P 500 (SPX) will open up or down on April 22, based on whether the official opening level is above or below the previous trading day's official close. The market resolves on April 22, 2026, using official SPX index data, making it a straightforward way to follow prediction market odds on the next S&P 500 opening move. PolySpotter is currently tracking $2,274 in smart money activity on this market.

This market will resolve to "Up" if the official S&P 500 Index open price for S&P 500 (SPX) on April 22 is higher than the official S&P 500 Index closing price for SPX on the most recent prior trading day. This market will resolve to "Down" if the official S&P 500 Index open price for S&P 500 (SPX) on April 22 is lower than the official S&P 500 Index closing price for SPX on the most recent prior trading day. E.g., ordinarily, a market on Monday would refer to the previous Friday for its most recent closing price, unless that Friday were a market holiday, in which case it would refer to Thursday, or the next most recent trading day. If the two prices are exactly equal, this market will resolve 50-50. Note that all figures will be rounded to the nearest cent using standard rounding. If SPX does not trade at all during the regular session, the market will resolve 50-50. If either of the relevant days are shortened (for example, due to a market holiday schedule), the official open/close price published by S&P 500 Index for that shortened session will still be used for resolution. If the previous trading day has no official closing price (for example, due to a trading halt into the market close, system issue, delisting, or other disruption), the market will use the last valid on-exchange trade price of the regular session as the effective closing price. The resolution source for this market is the Wall Street Journal, specifically the Open/Close values published by the WSJ under "Historical Prices". US: https://www.wsj.com/market-data/stocks EMEA: https://www.wsj.com/market-data/stocks/emea ASIA: https://www.wsj.com/market-data/stocks/asia

1 smart money signal detected, totaling $2,274.

Categories: SPX, Up or Down, Daily, Indicies, Finance, Rewards Automation 500, 4.5, 50

Notable Trades

99% win-rate market timer

A bettor with an exceptional 99% win rate made a sizable buy in a thin S&P open market, suggesting this routine-looking trade is still worth tracking despite the weak alert score.

  • This bettor wins 99% of resolved trades with 1,254 wins and $33k profit.
  • They bought $2.3k of Up, bigger than the market's recent volume in a thin book.
  • Entry at 78¢ suggests they see the opening direction as more likely than the market implies.

$2,274 on Up | Wallet win rate: 99%

Top Holders

  1. 0xe5f0...dc1d — Down, $6,237 (20% win rate)
  2. 0x9473...3b20 — Up, $4,293 (99% win rate)
  3. 0x264c...baca — Up, $2,668 (64% win rate)
  4. 0xe071...263b — Down, $815
  5. 0x8839...70ba — Down, $452
  6. 0xbefe...89c4 — Down, $441
  7. 0x151a...2b49 — Down, $427
  8. 0x63dd...c279 — Up, $397
  9. 0xdcf5...e9dc — Down, $386
  10. 0xf301...4ce1 — Down, $252

S&P 500 (SPX) Opens Up or Down on April 22?

15h$2,274 tracked1 signalSPXUp or DownDailyIndiciesFinanceHide From NewRewards Automation 500, 4.5, 50
Up
81¢
Down
19¢

This market will resolve to "Up" if the official S&P 500 Index open price for S&P 500 (SPX) on April 22 is higher than the official S&P 500 Index closing price for SPX on the most recent prior trading day. This market will resolve to "Down" if the official S&P 500 Index open price for S&P 500 (SPX) on April 22 is lower than the official S&P 500 Index closing price for SPX on the most recent prior trading day. E.g., ordinarily, a market on Monday would refer to the previous Friday for its most recent closing price, unless that Friday were a market holiday, in which case it would refer to Thursday, or the next most recent trading day. If the two prices are exactly equal, this market will resolve 50-50. Note that all figures will be rounded to the nearest cent using standard rounding. If SPX does not trade at all during the regular session, the market will resolve 50-50. If either of the relevant days are shortened (for example, due to a market holiday schedule), the official open/close price published by S&P 500 Index for that shortened session will still be used for resolution. If the previous trading day has no official closing price (for example, due to a trading halt into the market close, system issue, delisting, or other disruption), the market will use the last valid on-exchange trade price of the regular session as the effective closing price. The resolution source for this market is the Wall Street Journal, specifically the Open/Close values published by the WSJ under "Historical Prices". US: https://www.wsj.com/market-data/stocks EMEA: https://www.wsj.com/market-data/stocks/emea ASIA: https://www.wsj.com/market-data/stocks/asia

Price History — “Up”
84¢
69¢
54¢
Alert entriesHigh-conviction

Notable Trades

S&P 500 (SPX) Opens Up or Down on April 22?

2h ago

$2,274 on Up at 78¢

78¢→81¢↑3¢
S&P 500 April 22 Open Prediction Market Odds | PolySpotter