Will S&P 500 (SPX) close at $7,000-$7,500 in December?

Prediction markets currently give a 23% probability that Will S&P 500 (SPX) close at $7,000-$7,500 in December?. This contract trades at 23¢ on Polymarket, closing December 31, 2026. This market shows extreme mispricing with a 479% annualized implied yield on the Yes side despite only 23¢ pricing, suggesting severe undervaluation for a $500-wide band (roughly 7-7.1% of current SPX levels) over 255 days.

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23¢
Bid/Ask 21/25¢·Spread 4¢·Vol $0·OI $2,476.839·Closes Dec 31, 2026·253d remaining
0x7988f38c0e67179d5d982b3ad7e7f04ef86d746ae94f6fca3bdc47101837d4a1
7-day price359 snapshots · 3 regime
27¢23¢ current
Apr 813¢Apr 21

Analysis

2d ago

This market shows extreme mispricing with a 479% annualized implied yield on the Yes side despite only 23¢ pricing, suggesting severe undervaluation for a $500-wide band (roughly 7-7.1% of current SPX levels) over 255 days. The 582% realized volatility and 2.60 vol ratio indicate the market is pricing tail-risk scenarios, yet zero 24h volume and a thin 4¢ spread signal dangerously low liquidity that could cause sharp repricing on any meaningful order flow. The recent 3¢ price increase (20¢ to 23¢) combined with a 3/10 cliff risk score warrants caution—this appears to be a speculative, illiquid position where the extreme yield may reflect execution risk rather than true misprice opportunity.

Resolution rules

This market will resolve according to the official closing price for S&P 500 (SPX) on the final trading day of December 2026. If the reported value falls exactly between two brackets, then this market will resolve to the higher range bracket. If the final trading day of the month is shortened (for example, due to a market-holiday schedule), the official closing price published for that shortened session will still be used for resolution. If no official closing price is published for that session (for example, due to a trading halt into the 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 Yahoo Finance, specifically the S&P 500 (SPX) "Close" prices available at https://finance.yahoo.com/quote/%5EGSPC/history, published under "Historical Prices."

Indicators

IY (Yes) 483.0%
IY (No) 43.1%
Adj IY 242%
CRI 3
Overround 0.2%
▶ Full indicator table (5)
IndicatorValue
IY (Yes)483.0%
IY (No)43.1%
Adj IY242%
CRI3
Overround0.2%

Regime

Label
neutral
Score
0.5
Spread
4¢
Computed
4/22/2026, 12:37:26 AM
Indicators computed 4/22/2026, 12:23:19 AM

Trade

View on polymarketsf trade 0x7988f38c0e67179d5d982b3ad7e7f04ef86d746ae94f6fca3bdc47101837d4a1 yes 100

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