Kalshi Posts Record $3.9B Volume Week, Extends Lead Over Polymarket as Parlays Surge​

​Weekly notional volume bounced back sharply after last week’s post-Masters pullback, with the two leading prediction markets combining for $5.9B in weekly notional volume for the week of April 20, according to DeFi Rate’s prediction markets volume tracker. Kalshi posted $3.91B, up 27.8% week over week from $3.06B, while Polymarket reached $1.96B, up ~4% WoW
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