S&P 500 (SPX) Up or Down on August 3? final odds

Resolved YES · August 3, 2026Final price 100¢ YES — the market gave this a 100% implied probability.

"S&P 500 (SPX) Up or Down on August 3?" resolved YES on August 3, 2026 at a final price of 100¢ YES — a 100% implied probability — after $110K in total trading volume. The full odds history and the radar signals that moved it are below.

100%

implied probability

YES 100¢NO

recent price

+37¢ over the window

+37¢

24h change

$107K

24h volume

$110K

total volume

Aug 3, 2026

resolves

Radar activity on this market

Recent signals from PolyWatch's detectors watching this market 24/7.

No detector alerts on this market in the last 24 hours — quiet tape.

How this market resolves

This market will resolve to "Up" if the official S&P 500 Index closing price for S&P 500 (SPX) on Monday, August 3, 2026 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 closing price for S&P 500 (SPX) on Monday, August 3, 2026 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 specified closing 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 closing price published by S&P 500 Index for that shortened session will still be used for resolution. If either of the relevant days have 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 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

Quick answers

How did "S&P 500 (SPX) Up or Down on August 3?" resolve?

This market resolved YES on August 3, 2026. Its final traded price was 100¢ YES.

What did the market predict?

Before settling, the market priced the YES outcome at 100¢ — an implied probability of 100%. Comparing final odds with outcomes across markets is how prediction-market accuracy is measured.

How much was traded on this market?

$110K was traded over the market's lifetime.

Prices as of . Informational only — PolyWatch is read-only analytics, not financial advice.

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