According to @CoinMarketCap, prediction market notional volume reached $2.45B last week. Polymarket handled $986.58M (40.3% share), Opinion Labs $818.30M (33.4%), Kalshi $607.97M (24.8%), and Others $35.83M (1.5%), source: @CoinMarketCap. Ranking by weekly volume: Polymarket first, Opinion Labs second, Kalshi third, source: @CoinMarketCap.

According to @GreeksLive, notional block-trade volume for Nov 17-23, 2025 totaled $521,737,122 across Deribit and OKX, source: @GreeksLive. Deribit accounted for $516.9 million, while OKX recorded $4.8 million, implying approximately 99.1% vs 0.9% venue share based on the reported figures, source: @GreeksLive. The seven-day average notional volume was about $74.5 million per day, calculated from the stated total, source: @GreeksLive. A recap of the top five block trades for the week was also provided by the source, source: @GreeksLive.

According to @GreeksLive, notional block trading volume totaled $1,076,585,040 for the week of September 29 to October 5 across Deribit and OKX, confirming a $1.0766 billion weekly tally, source: GreeksLive on X, Oct 6, 2025. Deribit accounted for $963.0 million or 89.5% of the reported notional, while OKX handled $113.6 million or 10.5%, quantifying venue concentration in reported block liquidity, source: GreeksLive on X, Oct 6, 2025. The period covered was September 29 to October 5 and included a recap of the top five block trades via greeks.live as highlighted by the source, source: GreeksLive on X, Oct 6, 2025. On a run-rate basis, the total equates to roughly $153.8 million per day of block notional during the week, providing a sizing benchmark for crypto options order flow, source: GreeksLive on X, Oct 6, 2025. Traders monitoring crypto derivatives liquidity can use these venue shares to plan block execution routing and assess depth between Deribit and OKX under similar conditions, source: GreeksLive on X, Oct 6, 2025.