Eric Kopen

@predictdotfun I love the overall theme of your site, this is looking great 🙌

March Madness is now live on Predict! 🏀predict.fun/march-madness

The fact that Kalshi's "2028 U.S. Presidential Election winner?" market is resolved based on who gets INAGURATED rather than the winner of the election still boggles me.

@mustafap0ly this looks cleeeeean 🔥

march madness bracket is now live on polymarket - polymarket.com/sports/cbb/bra… we've added $2M in liquidity incentives for all the games - #mar-17-2026" target="_blank" rel="nofollow noopener">docs.polymarket.com/changelog#mar-… enjoy 😛

@DustinGouker Are there any resources out there about the procedural details of getting CFTC approval for a PM? I know there’s so many other exchanges just waiting for their approval, and seems to be a big barrier to entry. Curious how that unfolds behind the scenes.

Everyone is moving to own the plumbing to offer prediction markets rather than rely solely on partners.

Kalshi and Polymarket already both have markets for if an asset will be in a specific price range at a specific time, above/below at a specific time, and cross certain price thresholds by a specific date. Does this product offer anything that you can’t already construct with a combination of those markets?

Reading the tea leaves here peeps... my guess is that a big market maker spelled 'GIS' backwards really likes this agenda... Cboe Introduces Innovative Prediction Markets Framework, Expanding Choice Beyond Yes-Or-No Outcomes prnewswire.com/news-releases/…

@Kalshi I’m having trouble sharing my combos with friends so they can copy them easily. This used to work before, is it broken right now? Or am I just not doing it right?

@MickBransfield This is amazing, thank you!

We've hit 900 prediction markets. 1) This is resembling 2010 when everyone was building a "Social Network for X" because Facebook was successful, completely ignoring the network effect. 2) The growth in apps & tools (for Kalshi & Polymarket) deserves more attention.

@cthrin The map is the best part 🙌

2026 is a big year, and we're excited to launch our Election Hub to help support truth in reporting. Check the live odds at any time, for any market. See live election results as they happen.

@Kalshi @mansourtarek_ @luanalopeslara Are people working on addressing the discrepancy between market titles and their underlying rules? Happy to help audit the data🔍

It seems like a big chunk of the election markets on Kalshi are phrased this way. There is going to be a lot of confusion when someone wins the election and the markets don't close for 3 more months until inaguration. And it will be a mess if the winner somehow isn't inagurated.

With all this drama surronding the Ali Khamenei market on @Kalshi, I see another issue right around the corner...

@Kalshi or @Polymarket can you please add motocross racing? Thank you In advance 🙏

@TheAnthonCrypto @PrediDesk Still testing, but thinking of creating a data pipeline step that rephrases the resolution details to Yes/No for either side when it isn't automatically in that format.

@e_kopen @PrediDesk yeah, I've thought about this some time ago. how does PrediDesk solves this?

Prediction markets are usually sold as simple "Yes/No" contracts on future events. But as I've been working on the @PrediDesk relaunch, I’ve noticed something: exchanges are inconsistent with how they structure these contracts. It’s not just a data annoyance; it has non-trivial consequences for traders and devs.

Accounting for this at @PrediDesk is a challenge. Every venue I've integrated data from (including @Kalshi, @Polymarket, @opinionlabsxyz, and @trylimitless) use different resolution logic (Yes/No vs. Up/Down vs. Entities) for various contracts. It’s an essential layer for cross-venue comparison that no one seems to be talking about. Has anyone else noticed this? Curious to hear other thoughts.

Why does this matter? Liquidity: Kalshi essentially splits the liquidity of one event into two separate "Yes/No" buckets. Mispricing: In illiquid markets (like the Esports example via Kalshi below), "Team A wins" and "Team B loses" often trade at different prices (47 cents vs 48 cents).