Stock Markets March 23, 2026

Kalshi to bar competitors and candidates from trading on events they influence

Prediction market to implement preemptive blocks on sports participants and political candidates ahead of Monday announcement

By Avery Klein
Kalshi to bar competitors and candidates from trading on events they influence

Kalshi will introduce automated restrictions to stop athletes, coaches and officials from trading on markets tied to their own sports and will also bar political candidates from trading on markets linked to their campaigns. The platform says these moves will transition existing prohibitions against insider trading into proactive technical blocks that prevent such trades before they occur. The change comes as prediction markets face growing pressure to tighten controls on conflicts of interest and insider activity.

Key Points

  • Kalshi will implement automated blocks preventing professional and collegiate athletes, coaches and officials from trading on markets tied to their teams or leagues.
  • Political candidates will be prohibited from trading on markets associated with their own campaigns.
  • The measures convert existing insider-trading prohibitions into preemptive technical controls as prediction markets face increased scrutiny.

Kalshi plans to put technological barriers in place to stop certain insiders from participating in markets where they have a direct stake, the company will announce Monday. Under the new rules, professional and collegiate athletes, coaches and officials will be prevented from placing bets on markets tied to their teams or leagues. Political candidates also will be blocked from trading in markets that relate to their own campaigns.

Prior to this decision, Kalshi's rulebook already prohibited those kinds of trades as forms of insider trading. The new measures, however, will move beyond retroactive enforcement and institute a system that prevents such users from executing trades in the first place. That shift is intended to close a gap between policy and practice by installing preemptive controls at the platform level.

The planned adjustments come amid broader scrutiny of prediction markets and how they handle potential conflicts of interest. According to the company, the steps target clear examples of insider activity by disallowing transactions from individuals whose professional roles give them privileged information or influence over outcomes.

Advocates for stronger oversight of these exchanges have argued for more robust safeguards; some observers advocate for even stricter limits, including curtailing operations in markets deemed to present high conflicts. Kalshi's move represents a response to that mounting pressure by codifying automated restrictions for at least two explicit categories of participants - sports insiders and political candidates.

The implementation will convert existing prohibitions into hard, technical blocks on trading access for the specified groups. Details about the identification, verification and enforcement processes that will determine who is subject to the blocks were not described in the announcement. Nor were any additional categories of restricted participants specified beyond athletes, coaches, officials and political candidates.

Kalshi's update underscores the evolving compliance landscape for prediction markets as they adapt to concerns about insider trading and conflicts of interest. The company is preparing to publicize the details of the change in its Monday announcement.

Risks

  • Prediction markets are under mounting pressure to address insider trading, which could lead to further restrictions on market operations.
  • Some stakeholders favor more extensive limits, including blocking prediction markets from operating in high-conflict areas, creating uncertainty for market scope and product offerings.

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