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

Polymarket US saw nearly $92 million go through its 15-minute Bitcoin markets during its first full seven reported days, a much faster start than Kalshi saw when it launched the same short-duration format late last year.

The prediction market did more than 400 times as much 15-minute Bitcoin volume as Kalshi during those first full seven-day periods.

That doesn't mean Polymarket US will follow the same path as Kalshi. But it does show that this new product category is more than just a niche market.

Polymarket top-line performance on 15-minute crypto markets

• Polymarket US BTC before launch: $624,904 across all verified BTC markets during Sept. 15-21.

• Polymarket US first full week after launch: $101.19 million across directly classified Bitcoin markets from Sept. 23-29, roughly 162x the prior seven business days.

• BTC 15-minute volume: $91.76 million, or about 90.7% of directly classified Bitcoin volume during that first full week.

• BTC 1-hour volume: $8.74 million.

• Daily 15-minute volume: increased from $2.40 million on Sept. 23 to $27.71 million on Sept. 29.

• Reported transactions: increased from 63,650 to 739,034 over the same period.

Short-term markets are changing the size of the Bitcoin business