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We’ve decided to wind down Kalshinomics as we focus on other projects
We had fun building tools we wanted to use ourselves as traders. Thanks to everyone who used the site, shared our work, or sent feedback
For commercial inquiries: [email protected]
Kalshinomics retweeted
We’ve decided to wind down Kalshinomics as we focus on other projects
We had fun building tools we wanted to use ourselves as traders. Thanks to everyone who used the site, shared our work, or sent feedback
For commercial inquiries: [email protected]
Kalshinomics retweeted
46M contracts traded on 49ers–Rams
I broke down the taker flow and added a new chart tracking prices after large sweeps to see which takers got the better of the trade
both charts and the full breakdown on Resolution Pending
resolutionpending.substack.c…
long before there was Kalshinomics, there was already a suspicious tendency to put odds on everything
latest substack from Aaron 👇
nitter.cf/probaaron/status/20933…
before prediction markets, there were Phish setlist bets, Warcraft III tower defense and poker games with my brothers
I wrote about the games within games that led me here, and why I still love trying to put a price on uncertainty
resolutionpending.substack.c…
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Kalshinomics retweeted
I’d bet this looks very different weighted by volume
nitter.cf/probaaron/status/20887…
Kalshinomics retweeted
8 flips. 80 minutes. 3.05 million contracts
I reconstructed Kalshi’s Wisconsin Democratic primary swings and what the tape reveals about how traders processed live county returns
resolutionpending.substack.c…
Kalshinomics retweeted
I’m forecasting 21.9B Kalshi NFL game-winner contracts from the Hall of Fame Game through the divisional round, more than four times last season’s volume
here’s the data, assumptions, forecast range, and what would change my mind:
resolutionpending.substack.c…
Kalshinomics retweeted
A year ago if you told me I'd be speaking at a sports betting conference I'd say you were crazy. I probably watch 2 hours of sports a year.
But it happened.
I've done a bit of a 180 in terms of my opinions. When I first started looking at prediction markets I thought - "the non-sports markets are important and the sports are a necessary evil to get revenue."
In some ways my opinion has flipped. From a market structure perspective sports prediction markets are far superior to the state-regulated sportsbooks. And much of the problematic / dumb stuff is in other markets, e.g. insider trading on events (so far the people they catch mostly bet under their own name, WOW what an incredible KYC), easily manipulated things like mention markets, betting on TV shows that are already taped etc). I still like the wisdom of crowds, it's the implementation of that wisdom that feels a little yuck.
And yes there's a reasonable debate about taxation, effective regulation, and help for problem gamblers. But with this better model, there is plenty of room to be a better product and solve those issues. This is not an endorsement of any specific platform - competition (lacking in the OSB market) will lead to an even better product for the user.
I still think most people shouldn't bet on sports for any significant amount of money, but for those who want to, shouldn't they lose less?
Back on the Whirligig Bear Substack I wrote some of my thoughts about attending BetBash, it was fantastic meeting many folks I've followed online who were very generous in person.
@halfkelly @capjack2000 @d_feustel @spanky @ssigsbee @roiguy123 @Flupnolide @BigBuckHunterrr @goldenpants013 @Sports__Proj @CitadelSportsLV
Aaron's latest on why prediction markets need higher standards around fees, resolution and marketing
nitter.cf/probaaron/status/20847…
new: The Exchange That Posts Like a Casino
prediction markets want to be treated like exchanges but often market themselves like casinos
I wrote about their excellent APIs, real hedges, high fees, resolution failures and the legal fight beneath it all
open.substack.com/pub/resolu…
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Kalshinomics retweeted
I traded 688k contracts on Kalshi's LeBron next team market
a leaked YouTube video made me lean Miami. it did not hit
writeup below
Kalshinomics retweeted
Lebron James markets continue to dominate the top Open Interest market leaderboard on Kalshi
Capturing #1-7 among many others further down the list
Lebron James markets continue to dominate the top Open Interest market leaderboard on Kalshi
Capturing #1-7 among many others further down the list
Kalshinomics retweeted
What Happens to the Other Side of the Trade? open.substack.com/pub/resolu…
Across 26 Exact Score markets, $3.7m out of $9.9m total volume has been traded on Argentina beating Spain 3-2 in regulation
Argentina 3-0 is a distant second at just over $1m
nitter.cf/actuallyimthe/status/1…
Argentina just beat Spain at the 2026 World Cup final, 3-2.
Readers added context they thought people might want to know
Spain just beat Argentina at the 2026 World Cup, 1-0.
espn.com/soccer/story/_…
$75k in liquidity rewards are currently being offered for various World Cup markets on @Kalshi
from mentions, advertisers, attendance and more
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Search, filter, and sort all incentivized markets:
kalshinomics.com/kalshi?sear…
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