How often Polymarket and Kalshi edit their markets
Neither venue publishes the edit history of its markets, so this record starts when mine did: Oct 31, 2026, 09:06 UTC. It covers 41,725 markets. An edit made to every market in one event counts once.
Per day
By hour
Edit window
Detection to alert
By kind
By category
Edit windows by venue
| Venue | Edits | Median window | 90% within | Widest |
|---|---|---|---|---|
| Polymarket | 5 | 2.9 h | 10 h | 10 h |
Watched markets are checked every 5 minutes, Kalshi's updated markets about every 10, the busiest Polymarket markets every hour or two. Markets from the first snapshot can show a wide window on their first change.
Late edits
No rules-text edits yet
Once Polymarket or Kalshi rewrites a market's rules, this shows how many came in the last 48 hours before the end, and how many after.
Most edited markets
How traders rated edits
No edit has 5 answers yet
Traders answer one question on each change page: did this edit change who should win? An edit shows here once 5 people have answered.
The numbers on this page as JSON: /api/record. Every change with its full before and after text is in the Pro export.