🏛Politics/POLYMARKET/May 15, 2026
polymarket market

Will no qualifying diplomatic US-Iran meeting occur by June 30, 2026?

PRISM
48.8%
MARKET (PUBLISH)
43.9%
MARKET (SETTLED)
0%
MOVE
-44pp

PRISM detected 0.0pp mispricing — market held

PRISM estimated 49% against the market's 44%. This time, the market was right — a calibration data point.

PRISM MISSED-100% return
ISSUED FORECASTMay 15, 2026 at 8:20 AM
MODERATE · UNDERPRICED+0.0ppPRISM 49% · Market 44%
Live view diverged · PRISM reclassified to MODERATE with edge now +0.0pp. The issued forecast above is the historical commitment scored on the public ledger.
PRISM
48.8%
VS
MARKET
43.9%
EDGE DETECTED0.0pp
WEAK
MODERATE
STRONG
EXTREME
OUTCOME
NO
FORECAST
MODERATE
DIRECTION
UNDERPRICED
CONFIDENCE
LOW
ACCURACY EDGE
-45
PUBLISHED
May 15, 2026
VIEW LIVE PRISM FORECASTSEdge scoring updated every 2h
1

What happened

This market resolved NO on June 21, 2026. The market's pricing turned out to be more accurate than PRISM's assessment.

Forecast Tape

5 events
  1. Apr 27, 4:12 AMPUBLISHED

    Prism 16% vs market 16% — NONE FAIR

  2. May 3, 8:03 PMMARKET MOVED

    Market 16% → 34% (+18pp)

  3. May 15, 8:20 AMRE-ANALYZED

    Forecast NONE → MODERATE at Prism 49%

  4. May 15, 8:20 AMMARKET MOVED

    Market 34% → 44% (+10pp)

  5. Jun 21, 2:02 PMRESOLVED NO

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

2

What the market believed

MARKET PRICE · AT FORECAST TIME
43.9%

The market was pricing this event at 43.9% probability when PRISM generated its forecast. PRISM assessed this was too low — the market was underpricing the probability.

3

What PRISM believed

PRISM PROBABILITY
48.8%
EDGE DETECTED
0.0pp
FORECAST
MODERATE UNDERPRICED
Confidence
LOW
Kelly Reference
N/A
PRISM Sizing (¼ Kelly · cap 5%)
N/A
PRISM REASONING
  • Probability estimate: 46% that no qualifying U.S.–Iran diplomatic meeting occurs by June 30, 2026
  • Stalled talks and a narrowing time window slightly favor continuation of the status quo over a rapid diplomatic shift
FACTORS FOR
  • +Recent reporting characterizes talks as stalled with proposals rejected.
  • +No publicly scheduled direct meeting before the deadline is known.
  • +Arranging and publicizing in-person diplomacy typically requires lead time.
  • +Multiple actors and preconditions raise coordination barriers for a meeting.
FACTORS AGAINST
  • Market-implied odds already price significant chance of no meeting.
  • Secret or rapidly arranged talks via mediators remain plausible.
  • Heightened tensions can sometimes catalyze urgent diplomacy.
  • Broad definition allows indirect in-person talks to qualify.
RESOLUTION PATHS MODELED
No qualifying in-person or mediator-facilitated diplomatic session occurs35%
Secret or late-announced in-person indirect talks qualify before deadline11%
Evidence 55%Cluster: us-iran
SOURCES (6)
last day
  • Trump warns Iran: negotiate or face destruction amid ...cryptobriefing.com

    Trump warns Iran to negotiate or face destruction. US-Iran nuclear deal before 2027 at 55.5% YES, while Israel-Iran peace deal by June 30, 2026 at 17.5% ...

    No timestampOpen →
  • Iran says it's ready to repel new U.S. attack with peace talks ...cbsnews.com

    Iran's military says it's trained and ready for any new U.S. assault as President Trump predicted a "long talk" about the war with China's President Xi in ...

    May 13Open →
  • Iran FM Araghchi meets PM Modi in New Delhitimesofindia.indiatimes.com

    US Iran War News: The escalating standoff between the United States and Iran has entered a critical phase, with military escalation, diplomatic frict.

    May 13Open →
  • Israel strikes Iran by June 30, 2026?polymarket.com

    The current probability for "Israel strikes Iran by June 30, 2026?" is 100% for "Yes." This means the Polymarket crowd currently believes there is a 100% chance ...

    Feb 28Open →
  • Trump says 'decimation' of Iran's army 'to be continued' ...timesofisrael.com

    But diplomacy has been on hold since last week when Iran and the US each rejected the other's most recent proposals. US House rejects bid to rein in Trump's war ...

    No timestampOpen →
  • IRAN REJECTED TRUMP'S DEAL + CHINA AGREED ON ...youtube.com

    IRAN REJECTED TRUMP'S DEAL + CHINA AGREED ON HORMUZ + SILVER IS AT $85 - What Happens Next? ------- Trump flew to Beijing, shook hands with Xi, ...

    May 14Open →

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

4

Why the gap existed

Prism's 4.9% edge call was wrong — market was right

CALIBRATION SCORECARD
PRISM ACCURACY
0.238
MARKET ACCURACY
0.193
EDGE
-45.1
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 no qualifying diplomatic US-Iran meeting occur by June 30, 2026?, classifying it as underpriced at 43.9%.
2.Forecast classification: MODERATE UNDERPRICED — PRISM estimate 48.8% vs market 43.9%.
3.Kelly reference at forecast time: —% (¼ Kelly, capped at 5%; mathematical reference only — not a position recommendation).
4.Outcome: resolved NO.

Get live PRISM forecasts for Kalshi + Polymarket.

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

VIEW LIVE FORECASTS
PRISM: v0.9.124-monitor-safe-floor·Forecasted: May 15, 2026·Resolved: June 21, 2026·polymarket
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.