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MARKETS 60-second read

Polymarket US beats Kalshi’s launch-week 15-min Bitcoin volume by 406x

Published: 1 min read
An empty exchange floor at dawn, rows of bare metal desk stands casting long shadows under pale light breaking through high windows.

Polymarket US’s new 15-minute Bitcoin markets far outpaced Kalshi’s own launch week, according to DeFi Rate.

The hit

Polymarket US’s new 15-minute Bitcoin markets took in $91.76m during their first full week, according to DeFi Rate. That is more than 400 times what Kalshi managed in its own first full week after launching the same format last year. Trading activity, not bigger individual trades, drove the surge.

Why it matters

The numbers suggest traders are adopting the short-duration format quickly rather than a handful of large bets inflating the total. DeFi Rate cautions Polymarket US could still level off from here.

The record

Polymarket US BTC volume before launch (Sept 15-21) $624,904 (DeFi Rate)
Polymarket US total BTC volume, first full week (Sept 23-29), ~162x the prior week $101.19m (DeFi Rate)
Polymarket US 15-min BTC volume, first full week $91.76m (DeFi Rate)
Daily 15-min BTC volume growth, Sept 23 to Sept 29 $2.40m to $27.71m (DeFi Rate)
Kalshi 15-min BTC volume, first full week after its launch $226,000 (DeFi Rate)
Kalshi crypto volume, Sept 1-28 $8.17bn, 86% from 15-min markets (DeFi Rate)

What happens next

Watch whether Polymarket US’s volume keeps climbing or levels off. DeFi Rate notes Kalshi’s 15-minute markets kept growing for months after launch without displacing its one-hour product, which rose from about $3.2m to $15.8m a day.

Sources: Polymarket US 15-Minute Bitcoin Volume Hits $92M in First Full Week

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