A Columbia University study found that approximately 25% of Polymarket's trading volume over three years was artificially inflated through wash trading, according to blockchain analysis. Researchers identified that 14% of the platform's 1.26 million wallets exhibited coordinated self-dealing patterns. Artificial volume peaked at 60% in December 2023 before declining to 5% by May, with subsequent increases linked to speculation about a potential token launch.

Bitwise has triggered a 20-day automatic effectiveness period for its spot Dogecoin ETF by removing a delaying amendment from its S-1 registration on November 7, 2025. Under Section 8(a) of the Securities Act, the filing will become effective automatically unless the SEC intervenes. The fund could begin trading around November 26, 2025, if no regulatory action is taken.

Canada has introduced a regulatory framework for fiat-backed stablecoins under Bank of Canada oversight, allocating CA$10 million over two years starting in 2026, according to the country's 2025 federal budget released November 4. The initiative includes CA$5 million in annual operating costs to be recovered from regulated issuers. The Retail Payment Activities Act will be amended to bring stablecoin payment service providers under formal supervision.

Kraken announced on November 3 that European Union traders can now use Bitcoin, Ethereum, and approved stablecoins as collateral for perpetual futures on Kraken Pro. The exchange operates under MiCA and MiFID II regulations, with oversight from Ireland's Central Bank and Cyprus Securities and Exchange Commission. The platform reported $648 million in third-quarter revenue, marking a 50% quarterly increase.