CryptoRank’s October 13 post says prediction markets set weekly volume records for four straight weeks, reaching $23.9B last week, and attributes the main growth driver to Kalshi, citing its reported $4B daily high on October 11 (CryptoRank). That daily figure is about 16.7% of the weekly total, but it is a single day compared with a full week, so it does not measure Kalshi’s share of weekly growth. CryptoRank’s linked page aggregates Kalshi and Polymarket, but its live snapshot does not provide the historical split (CryptoRank market page). Separately, an October 12 post says sports trading has been a major contributor to prediction-market growth, but gives combined Kalshi and Polymarket figures for May to July, not the October record week (Filip Michalsky). The sources do not identify the specific markets behind the four-week streak or quantify Kalshi’s share of the $23.9B weekly volume.