What is PredictMarketCap?

PredictMarketCap is a prediction market data aggregator that compares real-time odds across Polymarket and Kalshi. It ranks markets by volume, shows cross-platform price spreads, and helps you find where platforms disagree on the same event.

How do prediction markets work?

Prediction markets let traders buy and sell shares tied to real-world outcomes. Each share pays out $1 if the event happens. If a share trades at $0.60, the market is pricing a 60% probability. Prices move as traders buy and sell based on new information.

What is the difference between Polymarket and Kalshi?

Polymarket is a crypto-native prediction market that trades in USDC on the Polygon blockchain. Kalshi is a CFTC-regulated exchange that accepts US bank deposits and is legal for US residents. PredictMarketCap compares odds across both platforms so you can see where they agree and disagree.

What is prediction market arbitrage?

Arbitrage occurs when the same event has different prices on different platforms. For example, if Polymarket prices an outcome at 60% but Kalshi prices it at 55%, traders can potentially profit from the spread. PredictMarketCap highlights these cross-platform price differences.

Markets:21,488

Total Volume:$4.24B

24h Volume:$182.35M

Polymarket$4.03B

Kalshi$207.92M

Prediction Market Rankings

Real-time odds and volume across all prediction platforms. Sorted by total volume.

Active Markets Resolved

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#	Market	Odds	24h	Volume	Ends
1	Will 1 Fed rate cut happen in 2026?2026 10 outcomes	28%1 (25 bps)	-	$7.26M	9 months	Trade
2	Will there be no change in Fed interest rates after the April 2026 meeting?2026 4 outcomes	87%No change	+2.0	$5.36M	1 months	Trade
3	Will Kevin Warsh be confirmed as Fed Chair? 3 outcomes	94%Kevin Warsh	-	$2.34M	7 months	Trade
4	Will NVIDIA be the largest company in the world by market cap on March 31? 3 outcomes	94%NVIDIA	-	$1.72M	3 weeks	Trade
5	AI Industry Downturn by December 31, 2026?2026	79%No	-0.7	$1.59M	9 months	Trade
6	Will OpenAI not IPO by December 31, 2026?2026 7 outcomes	59%No IPO by December 31, 2026	+3.5	$1.44M	3 months	Trade
7	OpenAI IPO closing market cap above $1T?	54%No	+1.0	$1.03M	1 years	Trade
8	Will SpaceX's market cap be greater than $1T at market close on IPO day? 3 outcomes	93%1T+	-	$940.2K	1 years	Trade
9	Jerome Powell out as Fed Chair by May 14, 2026?2026	98%No	+0.1	$708.7K	2 months	Trade
10	Will the DHS shutdown end after March 31, 2026?2026 6 outcomes	57%After March 31	+10.1	$665.4K	3 weeks	Trade
11	Ledger IPO before 2027?2027	71%Yes	+8.5	$462.5K	9 months	Trade
12	Will Apple be the second-largest company in the world by market cap on March 31? 3 outcomes	82%Apple	+3.5	$456.7K	3 weeks	Trade
13	OKX IPO in 2026?2026	83%No	-	$423.9K	10 months	Trade
14	CPI core month-over-month in May 2026?2026 7 outcomes	26%Exactly 0.2%	+3.0	$422.3K	3 months	Trade
15	SpaceX (Space Exploration Technologies Corp.) IPO before 2027?2027	92%Yes	-	$384.7K	9 months	Trade
16	Will OpenAI IPO by December 31 2026?2026	61%No	-1.5	$380.4K	-	Trade
17	Will Discord’s market cap be less than $15B at market close on IPO day? 6 outcomes	54%<15B	+1.5	$351.7K	3 months	Trade
18	Kraken IPO by March 31, 2026?2026	94%No	-0.5	$345.3K	3 weeks	Trade
19	Will Callum Turner be the next James Bond? 11 outcomes	49%Callum Turner	+1.0	$324.6K	3 years	Trade
20	US recession by end of 2026?2026	67%No	-0.5	$320.4K	11 months	Trade
21	Discord IPO before 2027?2027	82%Yes	-1.4	$308.2K	9 months	Trade
22	Will SpaceX's market cap be greater than $2.0T at market close on IPO day? 8 outcomes	61%2.0T+	-2.0	$307.4K	1 years	Trade
23	Anduril IPO before 2027?2027	70%No	-22.0	$284.9K	9 months	Trade
24	Databricks IPO before 2027?2027	73%No	-1.0	$275.8K	9 months	Trade
25	Altcoin market cap dip to $150B before 2027?2027	86%Yes	-1.0	$261.8K	10 months	Trade
26	Kraken IPO by December 31, 2026?2026	77%Yes	-1.5	$258.8K	10 months	Trade
27	Cerebras IPO before 2027?2027	84%Yes	+2.0	$245.0K	9 months	Trade
28	Will Alphabet be the third-largest company in the world by market cap on March 31? 4 outcomes	76%Alphabet	-2.5	$235.0K	3 weeks	Trade
29	Will the Fed’s lower bound reach 2.75% or lower before 2027?2027	59%No	-0.5	$234.4K	9 months	Trade
30	Will SpaceX have the highest IPO Market Cap 2026?2026 4 outcomes	84%SpaceX	+0.5	$234.2K	9 months	Trade
31	OpenAI $1t+ IPO before 2027?2027	77%No	-	$231.3K	9 months	Trade
32	Jerome Powell federally charged by June 30?	97%No	-2.5	$223.1K	3 months	Trade
33	Kevin Warsh confirmed as Fed Chair by May 1?	63%No	-2.0	$223.1K	2 months	Trade
34	US/Israel strike on Fordow nuclear facility by March 31?	51%Yes	-	$222.6K	3 weeks	Trade
35	Will the DHS shutdown last 30 days or more?	92%Yes	+6.0	$216.8K	1 weeks	Trade
36	OpenAI IPO closing market cap above $1.2T?	62%No	+2.0	$211.1K	1 years	Trade
37	Freddie Mac IPO before 2027?2027	78%No	+7.0	$210.8K	9 months	Trade
38	SpaceX IPO closing market cap above $1T?	91%Yes	-0.5	$209.3K	1 years	Trade
39	Will OpenAI IPO by June 30 2026?2026	97%No	-1.4	$203.7K	-	Trade
40	Will the U.S. tariff rate on China be between 15% and 25% on March 31? 5 outcomes	55%15–25%	-6.5	$198.8K	3 weeks	Trade
41	No change in Bank of England's interest rates after March 2026 meeting?2026 3 outcomes	87%No change	-0.3	$196.1K	1 weeks	Trade
42	Stripe IPO before 2027?2027	80%No	-0.5	$191.9K	9 months	Trade
43	Celonis IPO before 2027?2027	88%No	-	$188.5K	9 months	Trade
44	Will the Fed’s lower bound reach 3.0% or lower before 2027?2027	70%Yes	-	$186.7K	9 months	Trade
45	Will the upper bound of the target federal funds rate be 3.25% at the end of 2026?2026 6 outcomes	35%3.25%	-0.5	$182.0K	9 months	Trade
46	Will the Fed Pause–Cut–Cut in the next three decisions (Mar–Apr–Jun)? 3 outcomes	14%Pause–Cut–Cut	-0.1	$168.1K	3 months	Trade
47	Will SoFi Technologies (SOFI) be added to the S&P 500 by March 31, 2026?2026	98%No	-1.0	$166.0K	3 weeks	Trade
48	SpaceX IPO closing market cap above $1.2T?	85%Yes	-0.5	$164.6K	1 years	Trade
49	Applied Intuition IPO before 2027?2027	85%No	-11.0	$150.0K	9 months	Trade
50	Will real GDP increase by more than 1.0% in Q1 2026?2026 7 outcomes	72%Above 1.0%	-12.0	$149.9K	1 months	Trade

Prediction Market Rankings

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