Portugal Bans Polymarket Over €4M Insider Buying and selling Scandal

Portugal’s gaming regulator has banned crypto prediction platform Polymarket following suspicious buying and selling patterns through the nation’s presidential election that noticed over €4 million wagered in simply two hours earlier than outcomes emerged.

The Portuguese Gaming Regulation and Inspection Service (SRIJ) ordered the platform to stop operations and face blocking after figuring out its actions violate nationwide legal guidelines prohibiting political betting.

The controversy facilities on suspicious shifts in betting odds that occurred exactly when exit polls started circulating privately, elevating severe questions on info leakage and insider buying and selling on prediction markets.

Suspicious Betting Patterns Set off Investigation

Based on stories from Portuguese outlet Renascença, António José Seguro entered Sunday’s presidential election with 60% odds on Polymarket whereas challenger André Ventura held simply 30%.

By 6 PM, one full hour earlier than polls closed, Seguro’s likelihood had surged to 96%, reaching 100% when official projections confirmed his victory.

The timing proved much more suspicious in markets predicting the subsequent President of the Republic.

At 6:30 PM, Seguro’s probabilities of reaching Belém Palace rocketed from 68.6% to 93.2% inside a single hour.

Throughout that very same interval, Cotrim de Figueiredo’s odds collapsed from 22% to merely 2.5%, settling at 95% for Seguro by 8 PM when Portuguese voters first realized the outcomes.

Between 6 PM and eight PM, the essential window between Seguro’s odds surge and public consequence bulletins, over €5 million traded throughout varied markets.

Complete quantity in the principle presidential market exceeded $120 million (roughly €103 million), whereas various markets gathered practically $10 million (roughly €8.1 million).

The obvious thriller of how bettors accurately recognized the winner two hours earlier than official bulletins dissolves upon nearer examination.

Round 6 PM, preliminary exit ballot projections started circulating privately, all confirming a cushty Seguro victory with over 30% of the vote.

The 2 candidates will face off in a runoff poll on February 8, although Polymarket gained’t be obtainable for Portuguese bettors this time.

Portugal Regulatory Crackdown and Compliance Measures

The SRIJ confirmed it grew to become conscious of Polymarket “very lately” and considers the corporate’s exercise “unlawful.”

Based on Renascença, the regulator acknowledged that “the web site just isn’t approved to supply betting in Portugal, and below nationwide legislation, betting on political occasions or happenings, whether or not nationwide or worldwide, just isn’t permitted.”

Polymarket acquired notification on Friday to stop Portuguese operations inside 48 hours.

As of Monday, the location remained energetic, prompting SRIJ to inform community providers for platform blocking.

Portugal joins a rising record of nations limiting the platform.

Polymarket has been banned in Ukraine, Singapore, and France, whereas dealing with blocks in Australia, Belgium, Germany, the UK, Iran, and North Korea, amongst others.

Notably, considerations over insider buying and selling on prediction markets have intensified following high-profile bets on geopolitical occasions, notably after Polymarket practically completely predicted President Trump’s 2024 victory.

Austin Weiler, a researcher at blockchain intelligence agency Messari, argued that stopping insider buying and selling is “realistically attainable solely on prediction markets making use of Know Your Buyer (KYC) measures.”

“For KYC’d platforms, the simplest mechanism is to limit entry upfront for customers to particular markets,” Weiler defined, including that state actors could possibly be barred from political or geopolitical markets.

Kalshi Challenges Polymarket Dominance In Prediction Market

KYC necessities range extensively throughout established prediction platforms.

Kalshi enforces id verification as a part of its regulated mannequin below the US Commodity Futures Buying and selling Fee (CFTC) authority, main regulated exchanges like Coinbase to develop prediction market web sites working via Kalshi’s federally authorized framework.

Whereas Polymarket can be legally acknowledged by the CFTC, entry and permitted markets differ considerably, with ongoing authorized questions on whether or not the platform options contract buying and selling or playing below one other title.

Amid regulatory hurdles and Kalshi lawsuits, Polymarket’s December 2025 quantity breakdown confirmed a 28% improve in politics betting, with over $4.3 billion wagered in comparison with Kalshi’s $5.96 billion in the identical interval.

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