Updated Oct 16, 2026, 2:28 PM ET
Ballot measure · 3 November 2026

Arizona: Proposition 320

– Probability the measure passes TruthIndex™
Polymarket
–
Kalshi
42.0%
Spread
–
24h
–
7 days
–
Updated
Oct 16, 2026, 2:28 PM ET

Yes price, last 60 days

How to read this chart

The green line is the TruthIndex™, the chance of this outcome. Only one venue lists it, so the figure comes from that venue alone. The thinner line is that venue's own daily price.

The pale bands behind the lines are the rating zones (Toss-up, Lean, Likely and Safe), so you can see when the race moved from one rating to another. Move along the chart, or use the arrow keys, to read the values for each day.

More in Methodology
TruthIndex™KalshiRating zones

Prices

OutcomeTruthIndex™Kalshi24h
Yes – 42.0% –

Each venue's market

Kalshi2.8K contracts traded

Prices whether the measure passes.

Yes: Not counted: bid and ask more than 10 pts apart · bid 26.0% / ask 58.0%

If Proposition 320 passes in Arizona, then the market resolves to Yes.

This market may resolve early once a consensus of designated media sources has declared a winner. See full rules for details.

Full rules on Kalshi