Spain's gambling authority has recently acted decisively against Polymarket and Kalshi, the two leading prediction market platforms in the world. The Directorate General for the Regulation of Gambling, or DGOJ, initiated disciplinary action on May 26. They have mandated internet service providers to restrict access to these platforms due to their lack of a proper betting license under Spanish law.
#What specific actions did Spain take?
The DGOJ identified a series of regulatory shortcomings linked to both Polymarket and Kalshi. These include failures to implement identity verification processes, inadequate protections for minors, and insufficient measures to assist users who have opted for self-exclusion from gambling activities. The imposed restrictions are seen as a precaution and are expected to last around three to four months while formal investigations are undertaken.
#What is the impact of blocking Polymarket and Kalshi?
Blocking Polymarket and Kalshi is not merely a minor issue; it significantly impacts the prediction market landscape. Together, these platforms accounted for close to $9.7 billion in trading volume over the last month, which constitutes about 88% of the prediction market sector's total. Within this impressive volume, Kalshi represented roughly $5.9 billion and Polymarket about $3.8 billion. Their popularity surged following the 2024 U.S. presidential elections, transforming prediction markets from niche interests into mainstream resources cited by major news outlets.
#Is Spain's action a standalone occurrence?
Spain's regulatory measures reflect a broader global trend of increasing scrutiny on prediction markets. Similar actions have transpired in various countries, with Brazil setting restrictions on April 24, 2026, Argentina following suit in March 2026, and Ukraine imposing blocks back in January 2026. Each of these countries has concluded that prediction markets fall under the category of gambling products requiring local authorization, a requirement neither Polymarket nor Kalshi has pursued in these regions.
#How does this affect investors?
For traders using Polymarket or Kalshi, the immediate concern is geographic access limitations. If you are located in Spain, your ability to utilize these platforms has been curtailed for the foreseeable future. On a strategic level, the restrictions present a pressing challenge for both platforms. A thriving prediction market needs liquidity, derived from a large and varied user base; thus, blocking access in multiple countries reduces the pool of potential participants.
Should Polymarket and Kalshi decide to seek licenses across these jurisdictions, they will likely encounter a complex maze of regulatory requirements. This could mandate identity verification systems, age restrictions, responsible gambling features, and establishing local business entities.