Prediction sites, which allow bets on all topics from weather to politics, may be in breach of country’s rules

Spain’s ministry of consumer rights has blocked access to Polymarket and Kalshi while it investigates whether the leading prediction market sites are violating Spanish law by operating without a gambling licence.

On Tuesday the ministry said it had launched disciplinary proceedings against the two platforms, which allow users to bet on everything from the weather to political events, amid allegations that they lacked the “necessary administrative authorisation” to operate in Spain.