📈Finance/KALSHI/May 26, 2026
kalshi market

Will the S&P 500 be between 7525 and 7549.9999 on May 29, 2026 at 4pm EDT?

PRISM
37.0%
MARKET (PUBLISH)
15.0%
MARKET (SETTLED)
0%
MOVE
-15pp

PRISM detected 10.0pp mispricing — market held

PRISM estimated 37% against the market's 15%. This time, the market was right — a calibration data point.

PRISM MISSED-100% return
ISSUED FORECASTMay 26, 2026 at 6:07 AM
MODERATE · UNDERPRICED+10.0ppPRISM 37% · Market 15%
PRISM
37.0%
VS
MARKET
15.0%
EDGE DETECTED10.0pp
WEAK
MODERATE
STRONG
EXTREME
OUTCOME
NO
FORECAST
MODERATE
DIRECTION
UNDERPRICED
CONFIDENCE
MEDIUM
ACCURACY EDGE
-114
PUBLISHED
May 26, 2026
VIEW LIVE PRISM FORECASTSEdge scoring updated every 2h
1

What happened

This market resolved NO on May 29, 2026. The market's pricing turned out to be more accurate than PRISM's assessment.

Forecast Tape

2 events
  1. May 26, 6:07 AMPUBLISHED

    Prism 37% vs market 15% — MODERATE UNDERPRICED

  2. May 29, 11:30 PMRESOLVED NO

    Resolved NO. Market was closer than Prism on this call.

2

What the market believed

MARKET PRICE · AT FORECAST TIME
15.0%

The market was pricing this event at 15.0% probability when PRISM generated its forecast. PRISM assessed this was too low — the market was underpricing the probability.

3

What PRISM believed

PRISM PROBABILITY
37.0%
EDGE DETECTED
10.0pp
FORECAST
MODERATE UNDERPRICED
Confidence
MEDIUM
Kelly Reference
N/A
PRISM Sizing (¼ Kelly · cap 5%)
N/A
PRISM REASONING
  • Fundamental analysis indicates a moderate chance the index finishes in this narrow band
  • The index is already near 7,500, but typical daily volatility makes precise band hits uncertain
FACTORS FOR
  • +Index already near 7,500 with rising short-term trend.
  • +Target band only modestly above recent verified close.
  • +No known adverse macro events fixed for resolution date.
FACTORS AGAINST
  • Very narrow 25-point band versus typical daily volatility.
  • One-week horizon leaves exposure to macro or earnings shocks.
  • Single 4pm print required; intraday touches do not count.
RESOLUTION PATHS MODELED
Index grinds up slightly above 7,500 and closes calmly in band22%
Index rallies above band intraday then late-session fade lands in range10%
Overnight gap opens in band and muted trading ends there5%
Evidence 60%
SOURCES (3)
last week
  • S&P Global Announces Pricing of $2,000,000,000 Private Offering of ...press.spglobal.com

    The offering is expected to close on May 29, 2026, subject to customary closing conditions. The Issuer has also entered into a $500 million senior unsecured ...

    May 20Open →
  • Wall Street Poised for Test: Tech Reports, Inflation Data, Higher ...investing.com

    The U.S. weekly market probability map for May 25 - 29, 2026, suggests “Shorter trading weeks tend to be bullish!”. These probability maps are derived from ...

    May 25Open →
  • FRED verified macro/market datafred.stlouisfed.org

    ## VERIFIED ECONOMIC DATA — S&P 500 INDEX (FRED — USE THESE NUMBERS) CRITICAL: The following data is from the Federal Reserve Economic Database (FRED) and is verified. Use ONLY these numbers. DO NOT substitute with any other data. Indicator: S&P 500 Index Latest Value: 7,473.47 (as of 2026-05-22) — VERIFIED Change from previous: +27.75 (+0.37%) Trend (last 5 observations): RISING 2026-05-18: 7,403.05 2026-05-19: 7,353.61 2026-05-20: 7,432.97 2026-05-21: 7,445.72 2026-05-22: 7,473.47 ## PRE-COMPUTED MARKET MATH (use these numbers — do NOT recalculate) Target range: 500.00 – 752.00 Current value: 7,473.47 Position: ABOVE range by 6,721.47 (893.8% above upper bound) IMPORTANT: These are VALUE C

    May 26Open →

PRISM RETRIEVES EVIDENCE FROM A CURATED LIST OF PRIMARY WIRES + OFFICIAL SOURCES

4

Why the gap existed

Prism's 22.0% edge call was wrong — market was right

CALIBRATION SCORECARD
PRISM ACCURACY
0.137
MARKET ACCURACY
0.022
EDGE
-114.4
Brier edge
The market's probability estimate was more accurate than PRISM's on this call.
5

How this forecast played out

1.PRISM analyzed Will the S&P 500 be between 7525 and 7549.9999 on May 29, 2026 at 4pm EDT?, classifying it as underpriced at 15.0%.
2.Forecast classification: MODERATE UNDERPRICED — PRISM estimate 37.0% vs market 15.0%.
3.Kelly reference at forecast time: —% (¼ Kelly, capped at 5%; mathematical reference only — not a position recommendation).
4.Outcome: resolved NO.

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Edge scores, Kelly references, confidence levels, and resolution paths — updated every 2 hours, before the market corrects.

VIEW LIVE FORECASTS
PRISM: v0.9.176-actionable-slot-priority·Forecasted: May 26, 2026·Resolved: May 29, 2026·kalshi
For informational purposes only. Not financial advice. EdgeCal provides PRISM-generated market analysis and does not execute trades, manage funds, or guarantee returns. Past performance does not indicate future results.