Kalshi's Under‑21 Betting Loophole Yields $3.9B

Young Kalshi users have moved an estimated $3.9 billion on sports‑related contracts this year, highlighting a gap that lets 18‑ to 21‑year‑olds wager where state law normally bars gambling.

Teen traders generate billions on prediction contracts

Analysis of transaction data shows participants aged 18 to 21 accounted for roughly $5.4 billion in total trading on the exchange, with the bulk tied to athletic events. The same report notes that this cohort represents just 3.14 % of overall activity, yet its volume is sizable.

The platform classifies these contracts as financial instruments, placing it under the Commodity Futures Trading Commission rather than state gambling boards. That regulatory distinction permits anyone 18 or older to open an account, even though most states set the gambling age at 21.

Users purchase binary contracts that resolve to a yes or no outcome once a real‑world event concludes. The system then matches each buyer with a counterpart taking the opposite view, and only the correct side receives the payout.

For example, a contract might hinge on whether a particular team wins a playoff game, while another could depend on a political race outcome. The service also lets traders bundle several contracts into a “combo,” mirroring a parlay bet that pays only if every component succeeds.

“They try to create this experience, it’s like a video game type experience, in pushing this on young people,” said Les Bernal, national director of Stop Predatory Gambling. “Meanwhile, we know from the science that this is an extremely addictive product that causes incredible harm.”

The journal Science warned that the design of commercial prediction markets may support compulsive behavior. “Continuous novelty and infinite event streams eliminate stopping points, possibly weakening prefrontal inhibitory control. This architecture maximizes trading volume rather than forecasting accuracy, potentially driving neuroadaptation toward compulsive use in vulnerable individuals as rewards fade…” the paper read.

New York’s attorney general has filed a suit alleging the service runs an unlicensed gambling operation.

In testimony opposing a Connecticut bill that sought to raise the minimum age to 21, the service argued it does not set odds, act as a counterparty, or profit from losses. “It operates a neutral, two‑sided marketplace where standardized, fully collateralized contracts are traded at prices determined by supply and demand,” the statement said.