Kalshi Volume Sets 2026 High at $15.27B With First $3 Billion Day

Kalshi and Polymarket Global mixed for $16.43 billion in contract quantity in the course of the week of Sept. 14-20, a 16.3% enhance from the prior week. For a second consecutive week, NFL and faculty soccer sat at the middle of the motion, alongside the Federal Reserve’s rate of interest determination and a busy slate of worldwide elections.

Kalshi accounted for the overwhelming majority of that whole. It recorded $15.27 billion in quantity, its highest-volume week of 2026, translating to $3.53 billion in execution-price USD throughout 85.26 million trades. The week additionally included Kalshi’s first $3 billion buying and selling day. Sports accounted for $3.24 billion of exercise, with soccer markets that includes prominently among the many week’s busiest.

Top-line efficiency notes

• Kalshi: Displayed contract quantity reached $15.27 billion, translating to $3.53 billion in execution-price USD throughout 85.26 million trades. Kalshi accounted for 92.9% of the mixed contract quantity between itself and Polymarket Global.
• Sports: Sports accounted for $3.24 billion in quantity on Kalshi, with NFL and faculty soccer markets among the many largest sources of exercise in the course of the week.
• Crypto: Kalshi generated $2.16 billion in crypto contract quantity, far forward of Polymarket Global’s $188.00 million and making Kalshi the dominant platform within the class.

Kalshi’s first $3 billion day

Kalshi additionally recorded its first $3 billion day, with $3.17 billion in contract quantity on Sept. 20. The earlier day, Sept. 19, produced $2.81 billion. Those have been the 2 highest-volume days on Kalshi up to now in 2026.

These have been the ten largest markets of the $3 billion day, with recreation markets mixed throughout their winner outcomes to match the remainder of this report:

Rank	Market	Contract quantity
1	Cross-category combo (10 legs)	$44.11 million
2	LSU vs Ole Miss	$38.62 million
3	UFC: Van vs Pantoja	$18.00 million
4	Las Vegas Raiders vs Los Angeles Chargers	$17.02 million
5	Philadelphia Eagles vs Tennessee Titans	$16.37 million
6	Green Bay Packers vs New York Jets	$16.03 million
7	Atlético Madrid vs Real Madrid	$14.68 million
8	Jacksonville Jaguars vs Denver Broncos	$14.58 million
9	Washington Commanders vs Dallas Cowboys	$13.77 million
10	Minnesota Vikings vs Chicago Bears	$12.87 million

Those 10 markets accounted for $206.06 million, or 6.5% of the day’s quantity. The the rest got here from an extended tail of recreation, player-prop and combo markets throughout the trade.

A serious pattern behind Kalshi’s volume growth was the continued enlargement of cross-category multi-leg “Combo” markets. Mapped combo quantity on Kalshi reached $2.39 billion.

• The largest particular person Kalshi market within the weekly dataset was a 10-leg NFL combo spanning Carolina, Cincinnati, Tampa Bay, New York (Jets), Jacksonville, Las Vegas and 4 extra groups. It generated $71.49 million in contract quantity.
• Other main Kalshi combos included a multi-team MLB baseball combo ($39.49 million), an English Premier League soccer combo ($33.24 million), and an MLB whole runs combo ($30.03 million).

Kalshi holds 92% of mixed crypto quantity

Crypto was one other main supply of exercise for Kalshi in the course of the week, with the platform producing $2.16 billion in contract quantity.

• Crypto: Kalshi recorded $2.16 billion in crypto quantity, in contrast with $188.00 million on Polymarket Global.
• Kalshi’s crypto quantity was greater than 11 occasions the quantity recorded by Polymarket Global, giving it a transparent lead within the class.
• Overall crypto class quantity throughout Kalshi and Polymarket reached $2.34 billion, with Kalshi accounting for 92% of the full.

More NFL and faculty soccer … shocker!

NFL and faculty soccer have been among the many largest sources of market exercise on Kalshi. Sports accounted for $3.24 billion in quantity, with a number of particular person NFL and faculty soccer matchups producing tens of hundreds of thousands of {dollars} in contract quantity.

These have been a number of the prime sources of exercise:

• Detroit Lions vs. Buffalo Bills: Contract quantity on Kalshi reached $46.03 million.
• LSU vs. Ole Miss: Generated $49.60 million on Kalshi.
• Denver Broncos vs. Kansas City Chiefs: Recorded $47.06 million on Kalshi.

Kalshi’s quantity by market class

The file week didn’t come from one a part of the trade. Cross-category combo markets, which bundle legs from totally different classes right into a single contract, have been the biggest slice by a large margin, forward of soccer and crypto mixed. That can be why the most important slice within the chart beneath carries an uncategorized label, since these bundled contracts sit exterior Kalshi’s single-category buckets.

Take the combos out and the week seems to be extra acquainted. Sports quantity unfold throughout dozens of particular person video games and participant props, crypto exercise concentrated in Bitcoin and Ether markets, and every thing else, from monetary and financial markets to politics and climate, stayed small in opposition to a file whole.

Looking forward: Events to look at Sept. 21-27

• NFL football markets ought to stay one of many largest sources of prediction-market exercise on Kalshi. The schedule contains Falcons-Packers on Thursday night time, Cowboys-Ravens within the NFL’s Rio de Janeiro worldwide recreation, Rams-Broncos on Sunday night time. The full Sunday slate additionally contains Chargers-Bills, Jets-Lions, Chiefs-Dolphins and Bengals-Steelers, with Eagles-Bears closing the week subsequent Monday, Sept. 28.
• College soccer enters one other necessary weekend, with convention play offering a gradual stream of recreation and player-prop markets and a complete of six ranked matchups.
• The Federal Reserve will stay a significant supply of economic-market exercise even after its September charge determination. Fed officers have a number of appearances scheduled this week, together with Vice Chair Philip Jefferson on Tuesday and Governor Michael Barr on Wednesday. More financial knowledge, together with September PMI figures, jobless claims, new residence gross sales, and durable-goods orders, may additionally create new markets across the financial system and future Fed coverage.
• Crypto ought to stay one other main supply of Kalshi exercise following the class’s large $2.16 billion week.
• Baseball will enter the ultimate stretch of the MLB common season, with playoff races creating further markets round division winners, wild playing cards, and particular person video games. The common season continues by way of Sept. 27, giving Kalshi one other week of more and more consequential baseball markets.

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