On October 14, 2026, VolRoc recorded 188,341 active prediction markets across Kalshi and Polymarket, holding $917.9M in combined open interest. Day over day, active markets fell 34.5% and open interest fell 1.8% (vs October 13, 2026). Politics & Elections was the largest domain by open interest (29%), ahead of Sports (10%); together they accounted for 39% of all open interest. Kalshi carried 87% of active markets and Polymarket 13%.
Deterministic · template v1 · 2026-10-14
As of 2026-10-14 · 00:00 UTC
Active Markets
188,341
00:00 UTC freeze
Open Interest
$917.9M
Kalshi OI + Polymarket liquidity
Markets Traded · 24h
10,405
with trading activity
Kalshi / Polymarket
87% / 13%
by active-market count
Domain Composition — 12 domains
Mixed / Multi-category
158,614
Sports
11,396
Other
9,343
Politics & Elections
5,148
Crypto & Digital Assets
1,178
Technology & AI
754
World & Geopolitics
666
Entertainment & Culture
371
Companies & Business
310
Economics & Inflation
229
Climate & Weather
155
Monetary Policy
129
Science & Health
48
Venue-agnostic subject taxonomy from Kalshi series prefixes and
Polymarket title keywords. A residual Other bucket is reported honestly.
Yes-price across both venues, 10 buckets from 0 to 100. n = 188,341.
Largest Kalshi Series
Cross-category multi-markets
146,899
KXMVECROSSCATEGORY0
11,715
Nhlgoal
395
Nhlpts
197
Btcd
108
Dpworldtour
103
Nhlfirstgoal
97
Nhlast
94
Nbaspread
89
Trumpmention
88
Ytviewsw
80
Nflteamtotal
68
Kalshi market families (Polymarket is not series-structured).
About & Citation
This is the fixed-hour (00:00 UTC) state of every active market on
Kalshi and Polymarket for October 14, 2026. The live
Observatory
shows the current diurnal value; this record is immutable. Open interest combines Kalshi
open interest with Polymarket USD liquidity as comparable USD magnitudes. Sources: Kalshi, Polymarket.
How to cite
“VolRoc Prediction Market Archive — October 14, 2026.” https://volroc.ai/prediction-markets/2026-10-14/
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