Netflix's prediction market documentary backfires, plus trader Camden Mariotti

This Inside Prediction Markets episode opens with quick news, then interviews professional trader Camden Mariotti, a longtime friend of the hosts, about scaling a trading business on prediction markets.

In this episode

• A Netflix documentary on prediction markets "popped off" on Twitter because its trailer showed fraudulent touts in Vegas. The host thinks the film itself was pretty good, but 99% of people will only see the trailer (0:22, 0:45, 1:01).

• ProphetX raised $35 million, backed by Parlay Capital and Data Point Capital. Fanatics is acquiring its own DCM and clearing house; the host notes the downside is being stuck with the acquired technology (1:08, 1:20, 2:04, 2:21).

• Mariotti went from poker to sports betting; in the last year he moved to Kalshi and Novig, now 95% of his volume or higher (4:15, 5:06, 5:16).

• He finds prediction markets much easier to scale than legal books, where cash-flow and account friction is a handicap he calls non-existent on exchanges; a host says legals can suit $500,000 to $2 million a year (7:16, 7:35, 8:49).

• His main limit is technology, since execution comes down to speed; with only 24 hours in a day, you end up hiring people (14:48, 15:47, 16:48).

• His most expensive mistake: tired, he left orders on an esports match with no expiration. Such mistakes barely move his ROI, which he says shows how soft prediction markets are (39:25, 39:50, 40:08).

Episode from Inside Prediction Markets, published on YouTube.