ProbCastOdds Reliability
TodayTop MoversMarketsWhat ChangedAccuracyWatchlist
⌘K
Checking…
Hot Markets
Israel x Iran ceasefire continues through September 30?79%▼5.5Israel x Iran ceasefire continues through October 31?69%▼7.0Will WTI Crude Oil (WTI) hit (HIGH) $95 in September?71%▲13.5Will the Fed increase interest rates by 25 bps after the September 2026 meeting?57%▲3.0Iran full airspace closure by September 30?10%▼0.5Will Elon Musk post 40-64 tweets from August 31 to September 2, 2026?68%▲7.0Will WTI Crude Oil (WTI) hit (HIGH) $100 in September?40%▲10.5Will United Russia (ER) gain the most seats in the next Russian parliamentary election?71%▲2.0Will Bitcoin be higher 7 days from now?19%▼30.7Will I stay in masters this season?86%▲32.4Will the WTI Crude Oil Spot Price be above $83 on September 10, 2026?84%▲21.0Will WTI Crude Oil (WTI) hit (HIGH) $105 in September?21%▲7.2Israel x Iran ceasefire continues through December 31?60%▼7.0Will Grand Theft Auto VI Extended Look get less than 20 million views on week 1?80%▲11.5US announces end of Iranian blockade by September 21, 2026?13%▼2.5Will my brother start reading Harry Potter in the next week?95%▲44.8
Israel x Iran ceasefire continues through September 30?79%▼5.5Israel x Iran ceasefire continues through October 31?69%▼7.0Will WTI Crude Oil (WTI) hit (HIGH) $95 in September?71%▲13.5Will the Fed increase interest rates by 25 bps after the September 2026 meeting?57%▲3.0Iran full airspace closure by September 30?10%▼0.5Will Elon Musk post 40-64 tweets from August 31 to September 2, 2026?68%▲7.0Will WTI Crude Oil (WTI) hit (HIGH) $100 in September?40%▲10.5Will United Russia (ER) gain the most seats in the next Russian parliamentary election?71%▲2.0Will Bitcoin be higher 7 days from now?19%▼30.7Will I stay in masters this season?86%▲32.4Will the WTI Crude Oil Spot Price be above $83 on September 10, 2026?84%▲21.0Will WTI Crude Oil (WTI) hit (HIGH) $105 in September?21%▲7.2Israel x Iran ceasefire continues through December 31?60%▼7.0Will Grand Theft Auto VI Extended Look get less than 20 million views on week 1?80%▲11.5US announces end of Iranian blockade by September 21, 2026?13%▼2.5Will my brother start reading Harry Potter in the next week?95%▲44.8
Home/Politics/Will Ed Markey get at least 60% of the vote in the Massachusetts Senate Primary (Democratic)?
ManifoldPoliticsUpdated 13m ago

Will Ed Markey get at least 60% of the vote in the Massachusetts Senate Primary (Democratic)?

Market probability
85.6%
+35.6 percentage points
over 24 hours50.0% → 85.6%
14 days until the event deadline
Deadline: September 16, 2026 at 7:59 PM ET

The move lacks solid trading support — treat the new probability with caution.

The pricing has weak support: moderate trading volume. The probability moved another 7.1 points in the past hour — the market is still repricing.

How credible was the move?

Three separate questions — a move can be genuine while the latest price is still settling. Methodology →

Move validity

Is the move backed by real trading and depth?

Weak

The pricing has weak support: moderate trading volume.

Consensus stability

Has the market settled at the new probability?

Unsettled

The probability moved another 7.1 points in the past hour — the market is still repricing.

Contract clarity

Will the rules resolve without ambiguity?

High

The resolution rules are relatively specific, with a named source and a defined deadline.

Recent trade activity$165.2 traded

From the latest trade tape (most recent 200 prints) — a live activity sample, not a lifetime total.

Why the odds moved

The probability rose 35.6 percentage points over the last 24 hours (50.0% → 85.6%).

No verified catalyst has been linked to this move yet. ProbCast does not attribute moves to news without evidence connecting the timing of a specific report to the repricing.

What could move this market next?

  • The market's deadline arrivesSeptember 16, 2026 at 7:59 PM ET

    The contract must resolve based on what has happened by this date.

Derived from the contract's own mechanics as of Sep 1, 9:45 PM ET. ProbCast does not list scheduled meetings, announcements, or data releases it cannot verify.

Advanced analysis (experimental)

Research signals — these models are still accumulating the history needed for full validation, and they can disagree with the headline read. Model confidence: low · expected error ±30 pts.

Reacting to newsLegacy movement classifier: noisy

What's happening

high classifier confidence
Reacting to news

The price is actively repricing on real volume. The number is still moving — don't treat the latest print as settled consensus yet.

Market data

24h volume

Ṁ179.4

Liquidity

Ṁ100

Total volume

Ṁ0

Category
Change (pts)1H+7.16H+35.624H+35.67D+35.6
Score breakdown — Movement, Liquidity & Trust

ProbCast Trust Score

0/ 100 · Low

Weakly supported. Treat this number skeptically. Main caveat: thin liquidity.

ProbCast measures how reliable this market probability appears — not what to trade.

Movement100

Magnitude of recent probability change

Liquidity54
ProbCast — Odds Reliability

Know whether prediction-market odds can be trusted. ProbCast analyzes liquidity, market activity, spreads, and price movement to help distinguish meaningful repricing from thin-market noise.

Questions? Chat with us on Telegram
TodayTop MoversEventsAll MarketsWhat ChangedVenue DivergencePolymarket vs KalshiMethodologyCoverageMeta's ArenaWatchlistTerms of UsePrivacyCrypto
  • Probability moved 35.6 pts in ≤6h on adequate liquidity

Read the latest price with caution; conditions make it an unreliable summary right now.

More details — reliability score, dynamics, durability
Reliability score
3Low
Where the price path tends to go next705 observed
  • Illiquid / quiet98%
  • Choppy / mean-reverting1%

Short-term motion of the price line (~1h), distinct from the environment above — not a prediction of the final outcome.

DurabilityMedium· half-life <1h
PredictabilityStable

Secondary read: leaning toward Trending.

A read-only classification of the market environment — how much weight the current price deserves as a read of consensus. It describes conditions, never a trade.

Politics
Venue
Manifold
Open interest
—
Current probability
85.6%
7-day range
50.0% – 85.6%
Resolves
Sep 16, 2026

Depth of the order book and volume

Trust breakdown

0/100 · Low

Weakly supported. Treat this number skeptically. Main caveat: thin liquidity.

  • Liquidity anchor+38
  • Price steadiness+0
  • Thin liquidity-20
  • Limited history-8
  • Big move, weak support-10
Trust score0 / 100
How these scores work →
View on Manifold

ProbCast provides prediction-market data and analytics for informational purposes only. Not financial, trading, betting, investment, legal, or tax advice. Market-implied probabilities can be wrong, illiquid, manipulated, or affected by ambiguous resolution rules.

Macro / Fed
Politics
AI / Tech
Geopolitics

ProbCast provides prediction-market data and analytics for informational purposes only. Not financial, trading, betting, investment, legal, or tax advice. ProbCast is not a betting platform, exchange, or broker and does not provide buy or sell recommendations. Intended for users 18+; availability of prediction-market activity varies by jurisdiction. Venue data is aggregated from third parties and may be delayed or inaccurate. See our Terms of Use.

Market-implied probabilities can be wrong, illiquid, manipulated, or affected by ambiguous resolution rules.

© 2026 ProbCast · [email protected]