Best Odds

Best Odds

Compare prediction market prices across Kalshi and Polymarket

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.
K+50K+40K+30K+20K+10EvenP+10P+20P+30P+40P+50
Kalshi

+22

Kalshi Lean
INDEX COMPONENTS
Kalshi
Polymarket
24h Volume (55%)
10%
90%
Liquidity (25%)
90%
10%
Turnover (20%)
1%
99%

Today's Snapshot

Head-to-head comparison of Kalshi and Polymarket across key metrics.
ACTIVITY
Kalshi
Polymarket
24h VolumeTrading activity
$3.39M
$29.85M
Liquidity TurnoverVolume / Liquidity
0.01x
0.44x
Volume per EventAvg. activity per event
$20.92M
$157.49M
DEPTH
Kalshi
Polymarket
Total LiquidityAvailable depth
$589.17M
$68.47M
Liquidity per EventDepth per event
$84.17M
$11.41M
All-Time VolumeHistorical total
$146.41M
$944.91M
BREADTH
Kalshi
Polymarket
Open EventsDistinct events
7
6
Open MarketsActive contracts
87
178
Markets per EventGranularity
12.4
29.7
MARKET SHARE
Kalshi
Polymarket
Volume Share% of 24h volume
10.2%
89.8%
Liquidity Share% of total liquidity
89.6%
10.4%
Turnover Share% of capital efficiency
1.3%
98.7%
Note: Metrics are calculated from matched events where both platforms have active markets.

Methodology

How we calculate the Dominance Index
The 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→
46 outcomes • $486.8M volume
OutcomeSpread
Gretchen Whitmer wins the 2028 Democratic presidential nomination$0.03
Jon Ossoff wins the 2028 Democratic presidential nomination$0.03
Andy Beshear wins the 2028 Democratic presidential nomination$0.03
+43 more
Super Bowl Champion 2026→
16 outcomes • $200.3M volume
OutcomeSpread
Seattle Seahawks win Super Bowl 2026$0.02
Denver Broncos win Super Bowl 2026$0.02
Los Angeles Rams win Super Bowl 2026$0.01
+13 more
Fed decision in January?→
6 outcomes • $186.1M volume
OutcomeSpread
No change in Fed interest rates after January 2026 meeting$0.19
Fed decreases interest rates by 25 basis points after January 2026 meeting$0.14
Fed increases interest rates by 25 or more basis points after January 2026 meeting$0.0098
+3 more
Who will win US President Elections 2028→
33 outcomes • $183.6M volume
OutcomeSpread
Marco Rubio wins the 2028 US Presidential Election$0.02
JB Pritzker wins the 2028 US Presidential Election$0.02
Josh Shapiro wins the 2028 US Presidential Election$0.02
+30 more
College Football Champion 2026→
76 outcomes • $23.9M volume
OutcomeSpread
Oregon wins the 2026 College Football National Championship$0.02
Indiana wins the 2026 College Football National Championship$0.02
Ole Miss wins the 2026 College Football National Championship$0.0050
+73 more
NFC Championship Winner→
7 outcomes • $10.0M volume
OutcomeSpread
Seahawks win the 2026 NFC Championship$0.02
Panthers win the NFC Championship$0.01
Bears win the NFC Championship$0.0100
+4 more
What price will Bitcoin hit in 2026?→
7 outcomes • $545.3K volume
OutcomeSpread
+4 more