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Kalshi CEO Tarek Mansour on The Case for Prediction Markets | Ep. 48

Tarek Mansour is the co-founder and CEO of Kalshi. Kalshi is a regulated prediction market exchange valued at $22B in 2026 where people trade on the outcomes of real-world events – things like inflation prints, Fed decisions, elections, or weather events. Instead of betting against a house, users trade against each other in a market, and prices reflect the collective probability of an outcome happening. Before starting Kalshi, Tarek worked as a quantitative trader at Goldman Sachs as a structured credit and equities analyst and at Citadel as a global macro trader. During his time at these firms, he realized a common thread: a lot of trading stemmed from an opinion on a future event. We covered the idea behind prediction markets and how they offer a more direct way to trade on beliefs about the future. The conversation follows the long, difficult path to building a regulated exchange in the U.S., from early skepticism to ultimately winning a landmark legal battle. We also discuss how these markets can improve forecasting, enable new forms of hedging, and change how information gets priced. Timestamps: (0:00) Intro (0:23) Kalshi’s genesis (5:05) Regulation-focused from inception (11:06) Suing the government (18:02) Gambling vs. financial markets (20:58) Defining insider trading (25:38) Incentive structure of the system (32:40) Investing vs. trading (35:31) Hedging use cases (41:38) Scaling a lean team (44:02) Defining Kalshi’s culture Links: https://x.com/jaltma https://x.com/mansourtarek_ https://kalshi.com/ https://uncappedpod.com/ friends@uncappedpod.com

Tarek MansourguestJack Altmanhost
Apr 29, 202647mWatch on YouTube ↗

CHAPTERS

  1. Why Wall Street gets the event right but the trade wrong (Brexit, Trump, earnings)

    Tarek explains the core insight behind Kalshi: traditional markets often force traders to bet on how prices will react to events, not the events themselves. Examples like Brexit and the 2016 election show how people can make correct predictions yet lose money because the market reaction is hard to forecast.

  2. Prediction markets as information aggregation: getting “10% smarter about the future”

    They discuss the conceptual promise of prediction markets: markets aggregate dispersed information into a single probability-like price. Tarek frames the product value as incremental forecasting improvement that can compound across many decisions.

  3. Kalshi’s genesis: MIT roots, finance training, and the YC hackathon spark (2018)

    Tarek shares his personal background (Lebanon, math, MIT) and early career in finance (Goldman, Citadel) that shaped the idea. Kalshi’s first prototype emerged at a YC hackathon in October 2018, where the concept won despite skepticism about legality.

  4. Regulation-first as a founding principle: choosing the hard path onshore

    Instead of launching offshore or in legal gray areas, Kalshi decided from day one to become regulated in the US. Tarek describes the psychological grind of regulatory work—slow, non-linear progress with few encouraging signals.

  5. Making “event futures” legible to the CFTC: defining commodities, manipulation, and scale

    Tarek details early conversations with regulators and the conceptual hurdles: can an event outcome be a commodity, how to prevent manipulation, and how an exchange could list hundreds of markets. None of the issues were individually fatal, but together they felt like climbing Everest.

  6. First breakthrough and then whiplash: 2020 approval, narrowed launch, and no traction

    Kalshi gained approval in November 2020, but the administration change brought renewed caution and constraints. The company launched with a small set of economic markets, which didn’t achieve product-market fit, reinforcing the need to broaden market coverage.

  7. The election-market push, repeated blocks, and the pain of layoffs (2022–2023)

    Tarek recounts the long attempt to list election markets as the catalyst needed for liquidity and public understanding. After delays and eventual blocks, Kalshi faced internal doubt, team attrition, and layoffs—described as among the most painful moments of his life.

  8. Suing the government: anti-pattern risk, retaliation, and the 2024 win

    With few options left, Kalshi sued its regulator despite being a small company. Tarek describes the predicted retaliation—delays, extended audits, and “death by a thousand cuts”—but emphasizes the importance of winning and what it unlocked.

  9. Gambling vs. financial markets: open marketplaces, natural events, and the 1905 grain-futures analogy

    Tarek explains how the lawsuit clarified the line between gambling and financial markets. The distinction hinges on market structure (peer-to-peer exchange vs. house) and whether the underlying risk is “natural” (real-world events) rather than artificially created, echoing historic debates around grain futures.

  10. Insider trading vs. manipulation in prediction markets: fairness as the north star

    They unpack how Kalshi thinks about insider trading and market manipulation, borrowing concepts from securities markets. Tarek argues the core goal is fairness and participation—too much insider advantage destroys liquidity and trust.

  11. Incentive design and the “bad version” of gambling: why the house model creates harm

    Tarek steel-mans concerns about gambling by focusing on incentives. When platforms profit from customer losses, they’re pushed to maximize unhealthy behavior and restrict informed winners; an exchange model aligns incentives toward neutrality, transparency, and safer participation.

  12. Trading vs. investing: why prediction markets can feel more “winnable” for Main Street

    Jack and Tarek contrast investing (positive-sum long holding periods) with trading (often zero-sum). Tarek claims prediction markets can reduce Wall Street’s structural advantage by rewarding real-world research that ordinary participants can do, unlike highly efficient options markets.

  13. Hedging real-world risks: hurricanes, student loans, and institutional portfolio protection

    Tarek describes hedging as the second major function beyond price discovery. Retail users hedge tangible risks like hurricanes or policy outcomes, while institutions can hedge election or regulatory exposure without liquidating core positions.

  14. Infinite markets: pricing more dimensions to price everything else better

    Tarek presents a theory that as society grows more complex, asset prices depend on more interlocking variables (AI, geopolitics, pandemics, regulation). Prediction markets can price these subcomponents, improving broader resource allocation and traditional asset pricing.

  15. Scaling with a lean team: high-output leadership, minimal hierarchy, and self-organizing work

    In closing, Tarek explains how Kalshi has stayed unusually small (~127 people) while scaling: intense founder involvement, few managerial layers, and dynamic allocation of people to the highest-priority problems. The tradeoff is embracing organizational chaos to move faster.

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