SPY (SPY) Up or Down on May 18? Probability Changes by 20.55% in 1 Hour

SPY (SPY) Up or Down on May 18? Market Data Insights

The probability for the market "SPY (SPY) Up or Down on May 18?" has experienced a notable shift. Over the past hour, as indicated by the `windowLabel` of '1h', the probability has moved by a `deltaPct` of 20.55%. The current probability (`currentProb`) for this market stands at 26.45%.

This specific market resolves based on the price of the SPDR S&P 500 ETF Trust (SPY) on May 18, 2026, at 20:00:00 UTC. The `endDate` for this market is confirmed as 2026-05-18T20:00:00+00:00.

Key Data Points: * Market Question: SPY (SPY) Up or Down on May 18? * Probability Change (1h): +20.55% * Current Probability: 26.45% * Resolution Date: May 18, 2026

What to Watch Next: Traders and observers should monitor the probability changes in this market leading up to the resolution date. Significant fluctuations may indicate evolving sentiment or new information being incorporated by market participants. The volume and trade data, while currently showing zero for the past 24 hours (`volume24h`, `trades24h`, `whales24h`), may become relevant closer to the event date.

Understanding Prediction Markets: Prediction markets, like Polymarket, aggregate the beliefs of participants. The probability displayed for a market reflects the collective sentiment and perceived likelihood of a specific outcome occurring. A probability of 26.45% suggests that, based on current trading, participants believe there is a 26.45% chance of the outcome associated with the 'Yes' shares (in this case, SPY being 'Up' or 'Down' on May 18, 2026, depending on market structure) occurring. It is important to note that these probabilities are dynamic and can change based on new information and participant activity. The 'Up or Down' nature of the question implies a binary outcome which will be determined by the price action of SPY on the specified date and time.