Why Kalshi Is Suddenly Everywhere

Why it’s suddenly everywhere

1. 01

   A Wall Street Journal analysis found that trades sized at roughly $5,500 accounted for more than $5 billion of volume on Kalshi’s ether perpetual futures in a single month — and that the CFTC is examining the pattern, per its reporting.

2. 02

   On September 20, an X user flagged that nearly half the dollar volume on Kalshi’s ether perpetuals came from trades sized between $5,495 and $5,505; CNBC’s own analysis confirmed the clustering.

3. 03

   The scrutiny lands at the worst possible moment: Kalshi is reportedly in talks to raise at a $40 billion valuation and is exploring an IPO — a pitch built largely on surging volume.

4. 04

   Rival Polymarket faces parallel questions: on its international exchange, absurd long shots (a sub-3% Ethiopian prime minister candidate with $56 million traded) sometimes dwarf volume on near-certain outcomes.

The timeline

1. 1988The ancestor

   The Iowa Electronic Markets launch at the University of Iowa, letting students trade small-stakes contracts on US elections — the academic proof that markets can aggregate forecasts.

2. 2018Kalshi founded

   MIT classmates Tarek Mansour and Luana Lopes Lara start the company in San Francisco; "kalshi" is Arabic for "everything" — a market on everything.

3. 2020-11A first-of-its-kind license

   The CFTC designates Kalshi a Designated Contract Market — the first US exchange built specifically for event contracts. It publicly launches in July 2021.

4. 2023-11Kalshi sues its own regulator

   After the CFTC rejects its congressional-control contracts as gambling, Kalshi sues the agency — a startup taking its overseer to court.

5. 2024-10The courtroom win that changed everything

   A federal appeals court dissolves the stay, clearing Kalshi to list election contracts weeks before the presidential vote. Election trading goes mainstream overnight.

6. 2025-01Sports, the real growth engine

   Kalshi self-certifies sports event contracts. Within a year, sports make up roughly 90% of platform activity; Super Bowl Sunday 2026 alone tops $1 billion in volume.

7. 2025-12Unicorn, then decacorn

   A $1 billion round values Kalshi at $11 billion; five months later the valuation doubles to $22 billion, with Sequoia and Wellington reportedly circling at $40 billion.

8. 2026-06Into perpetual futures

   Kalshi launches US-regulated crypto perpetuals with fee rebates for self-clearing members, crossing $1 billion in volume within a week.

9. 2026-09The volume question detonates

   X sleuths flag the $5,500 trade cluster; Kalshi publishes a rebuttal; the WSJ reports CFTC interest; CNBC’s September 30 analysis sends "kalshi" up the search charts.

The backstory

An idea that waited thirty years for its moment

Prediction markets are an old academic dream. The Iowa Electronic Markets showed in 1988 that letting people put small money behind election forecasts produced strikingly accurate prices, and economist Robin Hanson spent the 1990s and 2000s arguing that such markets could price almost anything — he even sketched “futarchy,” a government run on market odds. The obstacle was never the theory; it was the law. In the United States, betting on events sat in a gray zone between gambling statutes and derivatives regulation, and no one had secured a federal license to do it as a proper exchange.

Kalshi’s founding insight was procedural rather than technical: instead of launching offshore or on a blockchain and asking forgiveness, Mansour and Lopes Lara spent two years inside the CFTC’s licensing process and emerged in November 2020 as the first Designated Contract Market built for event contracts. That license is the whole story in seed form. It let Kalshi argue — in court, to banks, to media partners — that its contracts are federally regulated derivatives, not bets. When the CFTC later rejected its election contracts, Kalshi did something almost no startup dares: it sued its own regulator, and in October 2024 it won. Election markets listed weeks before the presidential vote, and the idea Hanson had nurtured for decades suddenly had a ticker.

The growth that followed was real and staggering. Pew Research Center’s analysis of data from The Block shows combined Kalshi and Polymarket monthly volume rising from under $1 billion in mid-2024 to $53 billion in July 2026 — roughly on par with legal US sportsbook handle. Kalshi raised at $11 billion in December 2025, doubled to $22 billion by May 2026, and added 3 million users during the World Cup alone.

Why volume became the whole ballgame

For a private exchange courting public-market investors, volume is not just a metric — it is the valuation. Both Kalshi and Polymarket have cited surging volume to justify rounds at $22 billion, $40 billion and beyond, and both are reportedly exploring IPOs as early as next year. That is why the pattern flagged on September 20 matters so much: if a material share of headline volume is manufactured or incentive-churned, as Ulm University finance professor Andre Guettler warned in a working paper, then “headline volume and its trajectory may overstate the underlying trading demand on which such a valuation would rest.”

The mechanics are unusually concrete. Kalshi pays market makers flat monthly fees to keep $5,000 resting quotes on the book, and — since July — rebates perpetuals trading fees for self-clearing members. Faster traders can then pick off those stale $5,000-ish quotes for small, nearly riskless profits, thousands of times a day. Kalshi’s own rebuttal concedes the pattern while rejecting the label: hundreds of distinct takers were profiting from a slower, obligated market maker, it says, which is genuine arbitrage, not wash trading — and self-trades are mechanically blocked. Barnard economist Rajiv Sethi, who does not call it wash trading either, still argues the fee structure funnels money to liquidity takers and inflates the numbers. The ratio is stark: Kalshi’s ether perpetuals volume runs at about 66 times open interest, versus roughly one-third on industry leader Hyperliquid.

Meanwhile Polymarket’s international exchange shows its own mirror-image anomaly: volume piled into contracts with almost no chance of resolving yes — $158 million on Egypt’s sub-0.5% World Cup odds, more than on eventual champion Spain. Observers attribute it partly to “sharps” farming mispricings and partly to speculation about a future token airdrop. Either way, the two biggest names in the sector are now defending the integrity of the single number their valuations rest on — while CFTC Chairman Michael Selig tells television audiences the agency has “zero tolerance” for manipulative trading. It is the same trust question that put the US jobs report and its revisions in the headlines: once a headline number becomes the product, its credibility becomes the story. That collision, more than any single trade, is what pushed “kalshi” into the trending box this week.

Key facts

Founded

2018, San Francisco

Founders

Tarek Mansour & Luana Lopes Lara

License

CFTC DCM, Nov 2020

Flagged trades

$5B at ~$5,500 each

Peak monthly volume

$53B (Jul 2026, w/ Polymarket)

Reported valuation talks

$40B

What people are saying

Common questions

Is Kalshi legal in the United States?

Federally, yes — it is a CFTC-regulated exchange. But at least nine states, including Arizona, Massachusetts, Nevada, New York and Washington, have sued or moved against it, arguing its sports contracts are unlicensed gambling. Some federal judges have sided with Kalshi, others with the states, so availability genuinely varies by state and by court ruling.

What is wash trading, and was that proven here?

Wash trading means trading with yourself or a colluding partner to fake activity. Nothing has been proven: Kalshi says the flagged trades involved hundreds of distinct, profit-seeking users, and even independent experts told CNBC the pattern more likely reflects arbitrage fueled by fee incentives than classic wash trading. The CFTC has neither confirmed nor denied an investigation.

Why would anyone trade millions on a candidate with 3% odds?

Two main theories. Polymarket says sophisticated "sharps" harvest tiny mispricings at scale on its international exchange. Others point to speculation about a future token airdrop, where historical volume might determine rewards — making near-free volume on hopeless long shots worth farming. Polymarket declines to comment on airdrop speculation.