
S&P 500 (SPX) Opens Up or Down on April 16?
Prediction market · Polymarket
Overview
This market will resolve to "Up" if the official S&P 500 Index open price for S&P 500 (SPX) on April 16 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 16 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
Ticker
spx-opens-up-or-down-on-april-16-2026
Volume
98.5K
24h volume
98.2K
1w volume
98.5K
Open interest
61.1K
Liquidity
0
Liquidity AMM
0
Liquidity CLOB
0
Start
Apr 15, 2026
End
Apr 16, 2026
Status
Closed
Access
Restricted
Created
Apr 16, 2026
Resolution source
https://www.wsj.com/market-data/stocks
Event ID
381756
Slug
spx-opens-up-or-down-on-april-16-2026
Markets
1
Raw event data
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"slug": "spx-opens-up-or-down-on-april-16-2026",
"title": "S&P 500 (SPX) Opens Up or Down on April 16?",
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"question": "S&P 500 (SPX) Opens Up or Down on April 16?",
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}- S&P 500 (SPX) Opens Up or Down on April 16?Vol 98.5KLiq 0End Apr 16, 2026Closed