S&P 500 (SPX) Opens Up or Down on May 28?
Market price history
Rolling 7-day window of market NO price with the OU fair-price range overlay.
Not enough history yet for a chart.
New points land on each refresh — check back shortly.
New points land on each refresh — check back shortly.
Market price
YES40¢ (40%)
NO60¢ (60%)
Latest refresh · prices in cents
Polymarket • Volume: $11.5K • Updated 18m agoCloses: 2026-05-28
Polymarket · Financials
OU's Pick
YES at 40¢ · pays 2.5×
Price gap
Polymarket40¢
→OU's fair42¢
+2¢ underpriced · pays 2.5×
Confidence
Low
The market is currently open for trading on May 28 and the final opening price relative to the previous close has not been confirmed in the available data.
High volume$11k
Closes in12h
Off market consensus
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