Large Bet on U.S. Invasion of Cuba in 2026 Draws Scrutiny on Prediction Market

An anonymous trader on the prediction platform Polymarket placed a $57,500 bet that the United States will invade Cuba in 2026. The trade, made under the username JeffHK, occurred weeks after the account was created in February and was large enough to move the market odds, according to a report by USA TODAY.

The position showed several unusual characteristics, including the absence of any prior smaller trades, lack of diversification into other markets, and no visible portfolio history. Betting Intelligence, a firm that analyzes such activity, described the bet as outside normal trading patterns for the platform.

"You’ve got someone who’s either very inexperienced, or unsophisticated with high confidence," Gary Morland, co-founder of Betting Intelligence, said. " The firm’s other co-founder, Dan Zimmermann, wrote in a report that the slippage experienced on the trade suggested either poor execution or urgency to complete the order at any price.

After the position was established, other traders entered the market on the opposing side, reducing the value of the original bet. By early May the trader showed a paper loss of $34,000. Early on May 7 the account sold much of the "yes" position, realizing a five-figure loss.

The trader remains the largest holder in the market and would still profit if an invasion occurs before the end of 2026.

" As of early May all three contracts traded with implied probabilities between 21 percent and 45 percent for the "yes" outcome. A separate market on another platform asks whether Cuban President Miguel Díaz-Canel will leave office by the end of the year.

Those contracts have also traded with majority probability on the "no" side. The Cuba-related markets reacted to reports of statements from the Trump administration. In mid-March the administration announced a policy of "maximum pressure" on Havana.

In mid-April reports surfaced of a two-week deadline and discussions of a prisoner release.

The trade arrives amid broader attention on potential insider activity in prediction markets. A U.S. soldier was charged with profiting from classified information related to a raid on Venezuela. Some members of Congress have called for stronger measures against such practices.

The company that operates Polymarket stated it maintains systems to identify insider trading. In response to questions about the Cuba contracts, the company pointed to its handling of the earlier soldier case. "We flagged this, referred it, and cooperated throughout the process," the company said.

" Alex Goldenberg, founder of the intelligence firm Silent Index, said the publicized charge against the soldier is likely to deter some insiders but noted that basic steps could be taken to obscure identity. He added that foreign intelligence services, including those of Cuba, China and Russia, are probably monitoring the platforms because leaks of classified information have previously shown up in market movements.

Other participants in the market told USA TODAY they believe at least two additional large "yes" holders expect U.S. military action. One is a real estate agent based in Miami. , who uses the username SnowballHustle on the platform. Cardona, who grew up in Miami, said Cuba has long been a topic of discussion in his community.

He placed nearly $3,000 on the invasion outcome, which would return approximately $10,000 if it occurs. "Cuba is the ultimate U.S. real estate development plan," Cardona said. " He described the original large trade as "very suspicious" but noted that prediction markets contain both gamblers and individuals willing to risk careers for potential profit.