[Polymarket's Weekly Notional Trading Volume Surpasses Kalshi for the First Time Since Last November] Odaily Planet Daily News: According to Dune data, Polymarket's notional trading volume reached $2.38 billion last week, surpassing Kalshi ($2.3 billion) for the first time since last November. Currently, Polymarket ranks first in the prediction market sector with a 44.5% market share, followed by Kalshi at 43.1%, and Opinion at 6.8%. Additionally, Polymarket's single-day and single-month trading volumes both hit record highs.