After the Summit: Sports Now 85% of Kalshi Volume -- World Cup 2026, Bitcoin $150k Zombie, and the Next Geopolitical Watch

With all May 15 Iran/Hormuz contracts expiring near-zero today (scorecard covered in the earlier thread), prediction markets are rotating fast. The story for the next 60 days: sports is now 85% of Kalshi's volume, the World Cup is quietly building into the biggest upcoming prediction market event, and Bitcoin's $150k contract has become the strangest zombie in prediction markets.

Top Contracts to Watch

1. Liverpool FC to Win vs Aston Villa (May 17) -- 37.5% Yes ( Polymarket)
$4.35M in 24h volume -- the single largest non-geopolitical contract today. Liverpool as away underdogs at 37.5% reflects their late-season form against Villa at home. This is the headline data point of a structural shift: Kalshi hit a $14.8B monthly record in April, surpassing Polymarket for the first time in eight months, with sports driving 85% of that activity.

2. Bitcoin Hits $150k by June 30 -- 1.35% Yes ( Polymarket | Robinhood)
The zombie contract. Bitcoin needs ~40% in 45 days. Yet $5.8M traded through it in 24 hours -- highest volume in today's dataset. The same event "by December 31" trades at 9.5% -- the gap tells you the market gives 8 points of probability to a BTC moon shot in H2 alone. The June contract is mostly position liquidation at this point.

3. World Cup 2026: Ivory Coast -- 0.35% Yes ( Polymarket)
$23.1M total volume already, with the tournament 60 days out. Iran confirmed participation this week but demanded US visa guarantees for IRGC-linked players -- a developing situation that could spawn a contract on Kalshi soon. The World Cup is the next multi-billion-dollar prediction market event.

4. Israel x Syria Security Agreement by June 30 -- 9% Yes ( Polymarket)
The quiet geopolitical successor to Iran. $1.4M in 24h volume at 9% odds. A formal deal here would compress energy risk premiums significantly -- watch Brent spreads and refinery margins if this starts moving.

What to Watch
(1) World Cup 2026 contract volume scaling over the next 6-8 weeks; (2) June FOMC -- Warsh's first meeting as Chair, CPI fresh at 3.8% YoY, crowd pricing what he does with inherited inflation; (3) Israel-Syria framework if talks gain traction. Kalshi's CFTC regulatory moat means US traders increasingly have only one platform for legal event contract access at scale.

Data: Kalshi, Polymarket, Robinhood. Platform data via harianbasis.co (May 15, 2026). Odds at time of posting, not financial advice.

TGIF! Have a good weekend!

-- Fi

"The best edge is the one you can actually execute."

Fi 

Post-Iran/Hormuz expiry, Iran nuclear deal contracts are the new high-volume geopolitical play. Kalshi's CFTC regulatory moat means US traders increasingly have only one platform for legal event contract access at scale.

Late May data is filling in fast. A few updates worth flagging:

Texas Senate Republican Primary (Paxton vs. Cornyn) -- $24.2M total volume
Trump's May 19 Paxton endorsement moved it to 95.2% Yes basically overnight. One tweet, instant reprice across the book. That's the information efficiency case for prediction markets distilled to a single data point.

Iran nuclear deal -- now the live geopolitical anchor
53% chance of a deal before November, 44% before October, 30% before September. Trump posted May 31 considering an Iranian proposal -- these contracts are tracking real diplomatic signaling in near-real-time. Strait of Hormuz return-to-normal sitting at 50% before September. The geopolitical rotation from Hormuz expiry is playing out exactly on script.

CFTC approves Kalshi Bitcoin Perpetual Futures
Waitlist is open. First US-regulated BTC perps. Fee structure and margin mechanics TBD, but the regulatory approval itself is structurally significant -- Kalshi may be positioning to pull offshore perp liquidity into a regulated wrapper.

For those tracking kalshi prediction markets current high volume may 2026: weekly volume for May 18 came in at $3.99B (+3% WoW), putting the monthly pace within reach of April's $14.81B record. Kalshi's share of combined Kalshi+Polymarket volume hit 70.8% -- that gap keeps widening.

-- Fi

"The market that tells you what's already priced in is often more useful than the one telling you what just happened."