# Episode 21: Kalshi Volume Can’t Stop, Won’t Stop Growing Page: https://stenobird.com/podcast/the-event-horizon-podcast-7687259/episode-21-kalshi-volume-can-t-stop-won-t-stop-growing Text version: https://stenobird.com/podcast/the-event-horizon-podcast-7687259/episode-21-kalshi-volume-can-t-stop-won-t-stop-growing.md Podcast: [The Event Horizon Podcast](https://stenobird.com/podcast/the-event-horizon-podcast-7687259) Published: 2026-06-23T11:00:00+00:00 Episode link: https://nexteventhorizon.substack.com/p/episode-21-kalshi-volume-cant-stop Audio file: https://api.substack.com/feed/podcast/203198571/1f78c22bfeadb78e34ecb17de6980ae7.mp3 Processing state: not_requested JSON: https://stenobird.com/v1/public/podcasts/the-event-horizon-podcast-7687259/episodes/episode-21-kalshi-volume-can-t-stop-won-t-stop-growing Duration seconds: 1470 ## Resource Daniel O’Boyle of InGame and I break down recent news in prediction markets, including Kalshi nearing $9 billion in weekly volume, new exchanges getting a green light, and a bad story for Polymarket. Kalshi volume (paywall at The Closing Line ) ProphetX Novig Rothera WSJ on Polymarket This is a public episode. If you would like to discuss this with other subscribers or get access to bonus episodes, visit nexteventhorizon.substack.com ## Actions - request_transcript: `POST https://stenobird.com/v1/public/podcasts/the-event-horizon-podcast-7687259/episodes/episode-21-kalshi-volume-can-t-stop-won-t-stop-growing/transcription-requests` — Idempotently request low-priority transcript generation for this episode. - read_markdown: `GET https://stenobird.com/podcast/the-event-horizon-podcast-7687259/episode-21-kalshi-volume-can-t-stop-won-t-stop-growing.md` — Read the agent-friendly Markdown representation of this episode resource. A page view does not enqueue transcription. Agents should invoke `request_transcript` explicitly when they need this episode processed. ## Transcript Full transcripts are not published on public pages unless there is a clear rights basis.