Best Odds
Prediction Market Dominance Index
A composite score measuring market action on Kalshi versus Polymarket. The index combines 24h volume share, liquidity share, and liquidity turnover.Kalshi
+23
Kalshi LeanINDEX COMPONENTS
Kalshi
Polymarket
24h Volume (55%)
11%89%
Liquidity (25%)
83%17%
Turnover (20%)
2%98%
Today's Snapshot
Head-to-head comparison of Kalshi and Polymarket across key metrics.ACTIVITY
Kalshi
Polymarket
24h VolumeTrading activity
$8.07M
$68.10M
Liquidity TurnoverVolume / Liquidity
0.01x
0.31x
Volume per EventAvg. activity per event
$25.19M
$324.39M
DEPTH
Kalshi
Polymarket
Total LiquidityAvailable depth
$1.10B
$221.17M
Liquidity per EventDepth per event
$109.53M
$18.43M
All-Time VolumeHistorical total
$251.86M
$3.89B
BREADTH
Kalshi
Polymarket
Open EventsDistinct events
10
12
Open MarketsActive contracts
244
297
Markets per EventGranularity
24.4
24.8
MARKET SHARE
Kalshi
Polymarket
Volume Share% of 24h volume
10.6%
89.4%
Liquidity Share% of total liquidity
83.2%
16.8%
Turnover Share% of capital efficiency
2.3%
97.7%
Note: Metrics are calculated from matched events where both platforms have active markets.
Methodology
How we calculate the Dominance IndexThe Dominance Index measures where traders are most active across prediction markets. Each venue's share (0-100%) is calculated for three metrics, then combined using the weights below.
THE FORMULA
Index = 55% x Volume Share + 25% x Liquidity Share + 20% x Turnover Share
55%Volume Share
Each venue's 24-hour trading volume divided by total volume across both venues. Weighted highest as recent activity is the strongest signal.
25%Liquidity Share
Each venue's order book depth divided by total liquidity across both venues. More depth means larger trades execute with less slippage.
20%Turnover Share
Each venue's turnover ratio (Volume / Liquidity) divided by total turnover. Measures how actively capital is being deployed.
0KALSHI50EVEN100POLYMARKET
Browse Events
Democratic nominee for President in 2028
Gavin Newsom wins the 2028 Democratic presidential nomination
K 33%·P 24%9¢
Gavin Newsom wins the 2028 Democratic presidential nomination
K 33%·P 24%9¢
$1929.2M Vol
Republican Presidential Nominee 2028
J.D. Vance wins 2028 Republican presidential nomination
K 47%·P 37%10¢
Marco Rubio wins 2028 Republican presidential nomination
K 18%·P 21%3¢
$556.7M Vol
Who will win US President Elections 2028
JD Vance wins the 2028 US Presidential Election
K 28%·P 18%10¢
Alexandria Ocasio-Cortez wins the 2028 US Presidential Election
K 7%·P 5%2¢
$468.7M Vol
English Premier League Winner
Arsenal wins the 2025–26 English Premier League
K 80%·P 88%7¢
Manchester City wins the 2025–26 English Premier League
K 16%·P 12%5¢
$72.0M Vol
UEFA Champions League Winner
Bayern Munich wins the 2025–26 Champions League
K 16%·P 23%7¢
Arsenal wins the 2025–26 Champions League
K 21%·P 27%6¢
$66.8M Vol
La Liga Winner
Barcelona win the 2025–26 La Liga
K 58%·P 77%19¢
Real Madrid win the 2025–26 La Liga
K 39%·P 22%18¢
$57.2M Vol
2026 NCAA Tournament Winner
Arizona wins the 2026 NCAA Tournament
K 15%·P 28%13¢
Illinois wins the 2026 NCAA Tournament
K 4%·P 13%9¢
$29.6M Vol
2026 FIFA World Cup Winner
Uzbekistan wins the 2026 FIFA World Cup
P 0%
South Africa wins the 2026 FIFA World Cup
P 0%
$391.4M Vol
2026 NBA Champion
Charlotte Hornets wins 2026 NBA Finals
P 1%
Chicago Bulls wins 2026 NBA Finals
P 0%
$214.6M Vol
US government shutdown Saturday?
US government shuts down on Saturday
P 100%
$157.3M Vol
Scroll to load more