Polymarket | Crypto

Polymarket said it contained the compromise and removed the affected dependency after attackers injected a malicious script into its frontend. A third-party vendor compromise discovered Thursday allowed attackers to inject a malicious script into Polymarket's frontend, affecting multiple users. Blockchain analyst Specter said the malicious script appeared to facilitate a phishing attack that drained an estimated $2.94 million from at least 11 Polymarket user wallets. Polymarket said on X that the compromise has been contained and that the affected dependency has been removed. It added that users would be fully refunded. Read more

Hackers infiltrated Polymarket’s website via a compromised third-party vendor, the company said, swiping millions in crypto from users.

Polymarket emerged as an onboarding layer for about 60% of World Cup bettors, who interacted with the blockchain for the first time during their prediction market entry. About 60% of users who placed their first World Cup bets on Polymarket had never interacted with blockchain protocols before, suggesting prediction markets are becoming an entry point into crypto. The finding is based on a 90-day Bitget Wallet study shared with Cointelegraph on Thursday that tracked the onchain activity of 857,000 active Polymarket users. Bitget Wallet said the findings suggest some users are entering crypto through prediction markets instead of beginning with token trading or DeFi protocols. Read more

One of the largest U.S. derivatives exchanges is bringing back yes/no bets on the S&P 500 after pulling them a decade ago, moving onto turf that Polymarket and Kalshi turned into one of the internet's fastest-growing corners.

WSJ says Schwab is working with Cboe on S&P 500 prediction-style products, while Cboe's Mini-SPX materials show how Wall Street can package yes-or-no trades inside listed options. The post Charles Schwab prediction market partnership with Cboe to take traders away from Polymarket, Kalshi appeared first on CryptoSlate.

Kentucky has sued Polymarket, Kalshi and Kalshi’s partners Coinbase, Robinhood and Webull, over offering sports event contracts in the state. Kentucky has sued five prediction market platforms, including Kalshi and Polymarket, adding to a wave of US states launching legal fights with prediction markets over sports event contracts. State Attorney General Russell Coleman said in a statement Wednesday that his office filed lawsuits in state court against Polymarket and Kalshi — also naming Kalshi partners Coinbase, Robinhood and Webull — accusing them of “operating unlicensed and illegal sports betting and gambling platforms.” “Kalshi and Polymarket are operating illegal sportsbooks in Kentucky and breaking our laws,” Coleman said. “These multi-billion dollar corporations and their legal fictions don’t pass the sniff test. As one of our state legislative leaders said it best, ‘If it looks like a duck and quacks like a duck…’” Read more

Spain controlled the ball for nearly 75% of the match and took 27 shots at Cape Verde's goal on June 14, a stat line that usually ends in a win. Cape Verde's 40-year-old goalkeeper, Vozinha, walked away with player-of-the-match honors after a 0-0 draw that cost Polymarket bettors millions and made one obscure wallet roughly […] The post World Cup bettors are losing millions on Polymarket’s “safe” favorites appeared first on CryptoSlate.

[PRESS RELEASE – BELIZE City, Belize, June 16th, 2026] BC.GAME BC.GAME is integrating Polymarket, the world’s largest prediction market, to launch a new Prediction Center across sports, crypto and real-world event. BC.GAME today announced the launch of its new Prediction Center, powered by Polymarket, bringing prediction markets directly into the BC.GAME platform. Through the new Prediction […]

While rising volume on Polymarket and Kalshi is attracting quantitative firms to prediction markets, they aren't focusing on event outcomes; rather, they're exploiting market inefficiencies for profit.

South Korean police reportedly launched the country’s first illegal gambling probe into local Polymarket users amid election-betting scrutiny. South Korean police have reportedly launched the country’s first illegal gambling probe into local Polymarket users, widening regulatory scrutiny of the decentralized prediction market. The investigation is led by Gangwon Provincial Police and was requested by the National Police Agency, according to ChosunBiz.  Users may face fines of up to 10 million won ($6,500) under Article 246 of the Criminal Act covering gambling and habitual gambling. Under current law, Sports Toto is the state-authorized sports betting platform, while unauthorized online betting can be prosecuted under South Korean gambling laws. Read more

A Polymarket contract on whether Strategy sold Bitcoin by May 31 resolved to no after traders disputed how the sale should count. A disputed Polymarket contract on whether Strategy sold Bitcoin by May 31 resolved to “No” after two dispute rounds, despite Strategy later disclosing that it sold 32 BTC during the market’s covered window. UMA Optimistic Oracle (UMA) token holders voted to settle the market in “no” following a second resolution cycle that closed at 12:34 am UTC on Thursday, blockchain data shows. An overwhelming 98.6% of the 607 participants voted for the market to resolve in “no,” while only 1.4% voted “yes,” data from Betmoar shows. Read more

A nearly $150 million prediction market has devolved into chaos after the platform Polymarket moved to deny payouts to traders who accurately predicted that corporate treasury firm Strategy would sell a portion of its Bitcoin holdings. The dispute centers on a fundamental disconnect between when an event occurs and when it is publicly disclosed, exposing […] The post Why a $150M Polymarket bet could pay the side that appeared to lose appeared first on CryptoSlate.

Polymarket executive Josh Stevens said identity checks apply only to early beta access and are not being added to Polymarket’s existing platform. Polymarket’s vice president of engineering, Josh Stevens, clarified that the prediction market platform is not adding mandatory Know Your Customer (KYC) checks to its existing service, after a report said the company had considered user verification requirements. Stevens said in an X response that Polymarket is launching a new beta product for a select group of users and that KYC is required only to access the beta during its early test period. “No KYC is being added to any part of existing polymarket.com with this launch,” Stevens wrote. He said that once the product is out of beta, no KYC will be required to use it.  He later addressed questions about whether KYC could be added later, saying “no” and clarifying that he was “just highlighting” that identity checks are tied to early access for a new beta product rather than a broader move away from pseudonymous trad...

The predictions market operator reportedly explored mandatory user verification requirements, breaking from its policies of allowing traders to access its services using pseudonyms. Prediction markets platform Polymarket is reportedly considering measures to verify users in response to pressure from global authorities over sanctions violations and other areas of legal risk to the company. According to a Wednesday report by The Information, Polymarket has considered mandatory user verification requirements more in line with Know Your Customer (KYC) standards. The move comes as multiple countries have blocked or restricted access to the predictions market platform over concerns about illegal gambling. Source: Polymarket Read more

Spain is the latest country to clamp down on the rising use of prediction market platforms like Polymarket and Kalshi.

Spain joined a growing list of national authorities restricting or banning prediction market platforms amid concerns over unlicensed gambling activities. Spain’s gambling regulator blocked local users from Polymarket and Kalshi “as a precautionary measure” as authorities there address allegations the prediction markets platforms were in violation of gambling laws.  On Tuesday, Spain’s Directorate General for the Regulation of Gambling (DGOJ) said the country’s Ministry of Social Rights, Consumption, and Agenda 2030 had opened legal proceedings against the two companies, as they appeared to be operating without necessary licensing. The DGOJ issued an order blocking Spanish users from Kalshi and Polymarket until the proceedings were resolved, expected in three to four months. “The DGOJ wishes to remind the public that, in Spain — in line with other European jurisdictions — prediction markets are deemed to constitute games of chance when bets are placed on uncertain future outcomes,” according to a Tuesday notic...

Hyperliquid launches offchain event prediction markets with $12,800 opening OI. Analysts watch HYPE for breakout as the DEX targets Polymarket with CPI and Fed rate contracts. The post Hyperliquid Just Launched Prediction Markets to Take On Polymarket: Is HYPE About to Hit $100? appeared first on Cryptonews.

Indonesia blocked Polymarket after users bet on President Prabowo Subianto leaving office early, citing gambling concerns and expanding global scrutiny of prediction markets. Indonesia blocked access to Polymarket after the prediction market platform hosted wagers on whether President Prabowo Subianto would leave office before the end of his term. Indonesia’s Ministry of Communication and Digital Affairs (Komdigi) announced the block on Friday, describing Polymarket as an “online gambling site disguised as a prediction market.” "The government will not allow any form of online gambling in Indonesia,” ministry official Alexander Sabar said, adding: “Activities like Polymarket involve betting and speculation on uncertain outcomes, thus violating Indonesian law.” Read more

Prediction market Polymarket eyes Japan entry, Harvard sells off its Ethereum holdings, and other news: Hodler’s Digest

Representative James Comer asked CEOs of two major prediction market companies for information on their responses to insider trading after “suspiciously timed trades” related to US military actions against Iran. Update (May 22 at 7:40 pm UTC): This article has been updated to include statements from Polymarket and Kalshi. The chair of the US House of Representatives’ Oversight and Government Reform Committee sent letters to the CEOs of Kalshi and Polymarket, questioning the companies’ response to incidents of insider trading on the platform. In a Friday X post, Committee Chair James Comer confirmed reports that he had sent letters to Polymarket CEO Shayne Coplan and Kalshi CEO Tarek Mansour, asking them for internal records on how the companies were handling insider trading. The Kentucky lawmaker said there were concerns in Congress over elected officials using “basic insider knowledge” to profit off the government’s actions. Read more