Luana Lopes Lara Put the Future on the Trading Floor

The day before Kalshi was to commit to suing its own regulator, Tarek Mansour got cold feet. There were other products to build, other routes around the obstacle, other ways not to place the young company on a legal roulette wheel. Luana Lopes Lara listened to her cofounder reconsider the plan and responded with the sort of language seldom printed in a board memo. Mansour remembers the gist: was he kidding?

The next day, they took the proposal to the board. The plan violated a basic rule of regulated business: do not pick a fight with the people who hold your license. It also seemed to be the only remaining move. For two years, the Commodity Futures Trading Commission had refused to allow Kalshi to list contracts on elections. By late 2023, Lara had concluded that another round of patient persuasion would merely produce another round of patient refusal.

This was a striking turn for a company built around permission. Kalshi had spent years persuading the federal government to recognize an exchange where people could trade yes-or-no contracts on measurable events. Its founders could have taken the offshore route. They chose the difficult domestic one because they wanted brokers, hedge funds and institutions in the market. Regulation was not decorative legitimacy. It was part of the product.

“Doing it legally was something we couldn’t compromise on.”Luana Lopes Lara

Before probability, there was choreography

Lara was born in Belo Horizonte in 1996 and grew up in Brazil, including years in Niterói. Her parents enrolled her in ballet at two. What began as a childhood class acquired the demands of a profession. She trained at the Bolshoi Theatre School in Joinville, balancing academics with long days in the studio, then danced with Salzburger Landestheater in Austria after finishing school. Swan Lake came before software.

She also pursued a second exacting language. Her mother taught mathematics and her father was an electrical engineer. Lara studied for academic competitions late into the night, winning gold in the Brazilian Astronomy Olympiad and bronze in a state mathematics olympiad. At 17, after acceptance letters from several American universities, she chose MIT.

Ballet and mathematics make an elegant biographical pairing, perhaps a little too elegant. One arranges bodies, the other symbols; both punish approximation. Lara herself supplies the less polished version. “I don’t like to do anything halfway,” she has said. She finds hobbies difficult because enjoyment quickly becomes a demand for competence. Her public list of diversions includes painting, Pilates, matcha, history documentaries, Taylor Swift and her dog Lola. One suspects the painting is properly stretched.

There was an aspiration beneath all this exertion. As a student, Lara spoke about wanting to build something of lasting consequence. Ballet mattered deeply, but she did not imagine it as the boundary of her ambition. Moving to Cambridge did not erase the dancer so much as redirect her habits. At MIT, the daily corrections came from problem sets, research and code. The stage became a lab, then a trading desk. The audience became much harder to please: first federal regulators, then people deciding whether to risk actual money on her market.

A walk home and a missing instrument

At MIT, Lara met Mansour during orientation for international students. He had grown up in Lebanon; she had arrived from Brazil. They sat through many of the same computer-science and mathematics classes, joined the same social circle and found their way into quantitative finance. Lara worked at Bridgewater Associates, Citadel Securities and Five Rings Capital. During a shared internship at Five Rings in 2018, the pair would walk home through Manhattan’s Financial District.

The question that became Kalshi emerged from those walks. Traders constantly formed views about future events. Would Britain leave the European Union? Would an election change regulation? Would a storm disrupt supply? Yet to act on that view, they usually assembled proxies: stocks, swaps or options that might respond to the event but also to a dozen unrelated forces. A correct prediction could still produce a losing trade.

Why not isolate the event? A contract could pay one dollar if a clearly written outcome occurred and zero if it did not. Its price, between zero and one dollar, would also express the market’s probability. There was nothing mystical about the mechanism. Its charm lay in removing indirection.

The name was less considered. Mansour suggested “Kalshi,” an Arabic word for “everything,” because the domain was available and inexpensive. Lara assumed they would change it later. They did not. A placeholder quietly grew into a mission statement.

The longest product review in the room

Kalshi joined Y Combinator in 2019, but its decisive early work did not resemble an accelerator montage. The founders contacted more than 40 law firms before finding counsel willing to help. They spent roughly two and a half years explaining event contracts, surveillance, manipulation controls and hedging value to regulators. During the pandemic, Lara worked from London while Mansour worked from Beirut. There was no proper launch, only the possibility that years of effort would end in a government no.

In November 2020, the CFTC designated Kalshi as a contract market. The approval gave the company a legal category and a moat, but not a holiday from regulatory work. Each proposed contract still had to pass compliance review and be filed with the agency. Lara later called this “regulatory-market fit,” a neat phrase for building a product with a rulebook as one of its interfaces.

Election contracts tested the compact. Kalshi saw them as both commercially important and socially useful. The CFTC rejected them. After a painful 2022 retrenchment, the founders tried again. Rejection arrived again in 2023. Investors questioned the strategy. Mansour, trained to calculate ugly outcomes, could see several. Lara, by both accounts, kept returning to the same square on the board.

Their personalities form the useful comedy at the center of Kalshi. The two studied the same subjects and took similar jobs, so the familiar story about complementary skills does not quite fit. Lara calls herself “a very, very optimistic person.” Mansour describes his own temperament as alert to tail risks. He sees the cliff; she assumes there is a bridge. Between them, they may notice the engineering requirements.

Kalshi filed suit. In September 2024, a federal district court ruled in its favor, allowing the exchange to offer U.S. election contracts. Traders put more than $500 million into the presidential markets. The legal victory did more than open a product category. It made Kalshi legible to the wider public just as prediction markets were becoming a familiar tile on television screens and finance apps.

Every company models risk. Kalshi’s founders once made the model their strategy.

A market is also an argument

Lara’s case for prediction markets is epistemic as much as financial. People say all manner of things when expression is free. A price asks what they will support with money. Bring enough informed participants together, the argument goes, and their competing knowledge becomes a probability more useful than punditry or a social-media feed.

The users she talks about reveal the breadth of that idea. One small trader became an unusually good inflation forecaster. Lara’s favorite is an Ariana Grande fan who understood music-chart markets and, she said, used the winnings for student loans, a master’s degree and a car. Expertise had been hiding in a fandom; the exchange gave it a price.

There are limits, and they matter. Kalshi excludes some subjects, including war and assassination. Employees cannot trade on the exchange, which leaves its builders unable to use their own product in the ordinary startup fashion. The company monitors accounts, refers cases to the CFTC and argues that an exchange structure is safer than a bookmaker. Critics and states continue to dispute the boundary between financial contracts and gambling, particularly as sports became a large share of activity. The category remains unsettled because its success made the question harder to ignore.

Meanwhile, scale arrived quickly. Kalshi’s valuation moved from $2 billion in June 2025 to $5 billion in October and $11 billion in December. A $1 billion Series F led by Coatue in May 2026 valued it at $22 billion. The fresh emphasis is institutional: hedge funds, asset managers, trading firms and insurers that may want direct exposure to an event rather than an ingenious basket of proxies.

Lara, now based in New York, has said she wants to build the largest financial exchange in the world and hopes to take the model to Brazil. Such ambition can sound airy until placed beside the years when Kalshi had approval meetings instead of customers. She kept rehearsing the same difficult passage then. There is little reason to expect her to become casual now.

The ballerina metaphor is irresistible, so it should be handled with care. Companies are not dances, lawsuits are not leaps, and a valuation is a poor substitute for applause. Still, one lesson travels cleanly. A finished performance conceals repetition. Kalshi’s public breakthrough arrived all at once in 2024. Lara had been practicing the argument since 2018.