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- Polymarket attracted $3.6 billion in wagers on the 2024 US presidential election. Nearly a year before the election, the prediction market allowed users to bet on the winner. While most pollsters described the final month as too close to call, Polymarket's odds increasingly favoured Donald Trump, who began pulling away in early October.
- Polymarket distinguishes election predictions from election polling. Polls estimate how people intend to vote; Polymarket estimates the probability that a candidate will win. A 70% probability for Trump does not mean he will receive 70% of the votes. He could win by one percentage point while still having had a 70% chance of victory.
- The platform anticipated Biden's possible withdrawal before his disastrous presidential debate. Months before the debate, Polymarket had a market asking whether Biden would drop out. His withdrawal initially carried odds between 10% and 30%. During the debate, those odds rose dramatically as traders reassessed his chances of remaining in the race.
- Polymarket became an early indicator of Biden's political vulnerability. While sections of mainstream media continued suggesting Biden would remain in the race, the prediction market increasingly reflected expectations that he would withdraw. Coplan described this as the platform's first significant breakthrough into mainstream political discussion.
- Polymarket converts collective financial judgments into probability estimates. Users wager on future events, and the resulting prices indicate how likely the market believes each outcome to be. As new bets arrive and news develops, the probabilities change.
- The platform typically offers approximately 10,000 active questions. Its homepage is divided into 15 categories, including politics, culture, sports and finance. Individual questions can contain multiple possible outcomes or variations, although each trading contract ultimately resolves through a yes-or-no outcome.
- Polymarket selects questions based on their relevance to public discussion. Coplan said the company wants markets covering important developments in geopolitics, macroeconomics and culture whenever something becomes newsworthy.
- The platform covers subjects ranging from major political events to celebrity speculation. Examples include the Super Bowl, Taylor Swift's marriage and possible pregnancy, Elon Musk's weekly number of tweets, the Federal Reserve's decisions, presidential elections and international ceasefires.
- Polymarket also offers markets on entertainment and popular culture. One example concerned the most popular Spotify artist of 2025. During the interview, the market strongly favoured Bad Bunny.
- Some Polymarket markets raise questions about taste and social responsibility. The platform offers wagers involving conspiracy theories and wars, alongside conventional political and sporting questions. Its broad coverage creates opportunities for information discovery but also exposes it to criticism over what subjects should become tradable events.
- International elections attract substantial trading activity. An Irish presidential election market had approximately $135 million in wagers when discussed in the interview, illustrating the financial scale that political prediction markets can reach.
- A Venezuelan political market demonstrated how users can profit from relatively unlikely outcomes. More than $3.6 million had been wagered on whether President Nicolás Maduro would leave power before the end of the year. The market assigned that outcome a probability of approximately 23%.
- The Maduro market illustrated the platform's share-based payout mechanism. A user purchasing a position against Maduro leaving office at 78 cents would receive $1 per share if he remained in power. That produces a gross profit of 22 cents per share, before any applicable costs.
- Coplan believes financial incentives encourage people to investigate complex events. He argued that someone interested in geopolitics has a reason to study developments in Venezuela carefully and identify information that other traders might have overlooked.
- Polymarket's founder considers its probability estimates more useful than unrestricted online speculation. Coplan argued that prediction markets combine different opinions and information into a single probability. If people knew an outcome with certainty, its probability would be 100%; otherwise, the market provides an informed estimate rather than certainty.
- Shayne Coplan founded Polymarket during the COVID-19 pandemic. A native New Yorker who grew up on the city's Upper West Side, he dropped out of NYU during his freshman year. He was approximately 21 when he began building the company.
- The pandemic gave Coplan the idea of using prediction markets to answer uncertain public questions. During New York's lockdown, people wanted to know when restrictions would end, when vaccines would become available and when normal life would resume. He saw prediction markets as a way to consolidate the many competing opinions about such questions into measurable probabilities.
- Polymarket was built in approximately three months in 2020. Coplan moved quickly and did not obtain the regulatory approval required for its original US-facing operations. Its competitor, Kalshi, pursued regulatory approval instead.
- Prediction markets can benefit from people possessing information unavailable to other traders. When asked about the reliance on inside information, Coplan argued that people having an informational advantage can improve market accuracy. However, he acknowledged the need for careful market selection and strict ethical boundaries.
- Coplan considers the use of informational advantages difficult to avoid. He described it as an eventual feature of prediction markets, arguing that there are benefits and that society and market operators will need to adapt. He also said Polymarket spends considerable time considering where ethical boundaries should be drawn.
- Critics warn that certain prediction markets could financially incentivise criminal behaviour. One example involved a Polymarket question about how many acres would burn in the Los Angeles wildfires. Critics described it as an arson market, arguing that someone could deliberately start or intensify a fire to profit from the outcome.
- Polymarket faced criticism over its Los Angeles wildfire markets but defended its selection process. Coplan said the company held extensive internal discussions and selected only a small number of markets it considered highly informative and comparatively low-risk. He acknowledged the sensitivity of the subject while pointing out that these were small markets relative to the platform's overall offering.
- A major Polymarket trader identified as Domer has wagered more than $400 million on the platform. He described prediction-market trading as his full-time occupation and said he made nearly $3 million during the previous year.
- Domer rejects the description of himself as a conventional gambler. He considers his activity closer to investing because he makes decisions based on extensively researched views. He previously worked as a professional poker player but left poker because prediction markets offered greater excitement.
- Domer treats trading as a continuous information-gathering exercise. He described waking up and checking his phone within five seconds to discover what happened overnight. His explanation was that news never stops, so traders cannot afford to ignore developments while they sleep.
- Domer made a substantial profit betting on the election of an American pope. During the papal conclave, he backed an American candidate despite the market assigning the possibility odds of approximately 250 to one. He subsequently won $100,000 on the papal prediction.
- Domer identified JD Vance as a potential running mate for Donald Trump five months before the selection. At the time, Polymarket assigned Vance only a 2% probability of being chosen.
- Domer's Vance prediction came from analysing Trump's previous vice-presidential selection and apparent marketing preferences. He recalled that Trump had selected Mike Pence in 2016 and had previously been associated with the observation that Pence's one-syllable name resembled Trump's. Vance also had a one-syllable name and differed from Pence by only two letters.
- Domer turned a $4,000 wager on JD Vance into $250,000. His position illustrates how traders can profit by identifying possibilities that the broader market initially considers highly unlikely.
- The Commodity Futures Trading Commission investigated Polymarket in 2021. The investigation followed the company's launch without the regulatory approval required for its original operations. Coplan cooperated with the investigation and ultimately paid a $1.4 million penalty under a settlement.
- The settlement required Polymarket to stop serving US customers until it obtained the necessary licensing. The company geoblocked US trading and moved certain operations offshore. Coplan described the situation as regulatory incompatibility rather than an outright permanent ban, although the interviewer pointed out that the applicable restrictions were clear.
- US residents continued accessing Polymarket despite the restrictions. Some users circumvented the geographical blocking by connecting through VPN services that concealed their actual locations.
- The FBI visited Coplan's home during the final weeks of the Biden administration in 2024. Coplan described a forceful arrival involving agents shouting, banging on the door and using a battering ram. He was not arrested, but agents seized his phones and computers.
- The subsequent change in administration brought a different regulatory environment for Polymarket. In July, the government dropped its investigations, and Polymarket was able to acquire a fully licensed, legally compliant trading platform. This acquisition created a route for US customers to participate openly rather than circumvent geographical restrictions.
- Donald Trump Jr. joined Polymarket's advisory board approximately three months before the interview. He had already been serving as an adviser to competitor Kalshi, making his involvement with Polymarket particularly notable.
- Donald Trump Jr.'s investment fund, 1789 Capital, invested approximately $10 million in Polymarket. His advisory appointment and the investment placed a prominent member of the president's family inside the company's wider business and political network.
- Coplan faced questions about potential political influence arising from Trump Jr.'s appointment. The interviewer suggested that having the president's son on the advisory board could help Polymarket gain influence or protection from government action.
- Coplan denied appointing Trump Jr. to protect the company from political or regulatory threats. He argued that 1789 Capital had invested in the business and that the administration was strongly supportive of innovation, cryptocurrency and Polymarket.
- Coplan acknowledged that political guidance could be valuable to a young entrepreneur. He said he needed help navigating the political environment and saw nothing wrong with receiving advice from people who understood how Washington and politics worked. His explanation nevertheless leaves the broader question of political access and potential conflicts of interest open.
- The company behind the New York Stock Exchange announced a $2 billion investment in Polymarket. Coplan described the investment as the company's biggest validation to date. Days after the announcement, he met the interviewers on the New York Stock Exchange trading floor.
- Polymarket intends to integrate its prediction data into the stock exchange's information systems. Coplan said the company's probabilities would soon become available to investors and traders seeking an additional source of information when making financial decisions.
- The $2 billion investment valued Polymarket at $9 billion post-money. Coplan confirmed the valuation during the interview and said he had expected the company to reach this level of success.
- Coplan became a billionaire on paper through Polymarket's valuation. However, this represents the estimated value of his ownership rather than cash realised through a company sale or distribution of profits.
- Polymarket had not yet generated a profit. Its primary product, prediction information, was available free of charge, and the company was not yet charging trading fees. Its substantial valuation therefore reflected expectations about future growth rather than demonstrated profitability.
- Polymarket has tens of millions of people viewing its probabilities. Coplan estimated that the platform had several hundred thousand active traders, distinguishing its much larger audience of information consumers from the smaller group actually placing wagers.
- Coplan's long-term ambition is to reach one billion users within five years. When asked whether the company could achieve that target, he acknowledged that a billion people was an enormous objective and that the company would need to get many things right.
- Coplan measures the company's unfinished work against the potential global usefulness of prediction markets. He argued that billions of people could benefit from Polymarket's information. In his view, the company's work would remain incomplete until those people were actually using the platform and receiving value from it.