Question 1

What is PredictMarketCap?

Accepted Answer

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.

Question 2

How do prediction markets work?

Accepted Answer

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.

Question 3

What is the difference between Polymarket and Kalshi?

Accepted Answer

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.

Question 4

What is prediction market arbitrage?

Accepted Answer

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.

#	Market	Result	Volume	Resolved
1	Will the Democratic party win the governorship in Washington 2 outcomes	Democratic party	$18.7K	Nov 7, 2029	Details
2	Will Democratics win the Senate race in Vermont? 2 outcomes	Democratic party	$6.3K	Nov 7, 2029	Details
3	Will the Republican party win the governorship in Montana 2 outcomes	Republican	$3.3K	Nov 7, 2029	Details
4	Will Democratics win the Senate race in Maryland? 2 outcomes	Democratic party	$1.4K	Nov 7, 2029	Details
5	Will the Republican party win the governorship in West Virginia 2 outcomes	Republican	$867	Nov 7, 2029	Details
6	Will Democratics win the Senate race in Colorado? 2 outcomes	Democratic party	$147	Nov 7, 2029	Details
7	Will the Democratic party win the governorship in Delaware 2 outcomes	Democratic party	$84	Nov 7, 2029	Details
8	Will it be reported that the White House State Ballroom is completed and holds an event before Jan 1, 2029?	Before 2029	$418	Jan 1, 2029	Details
9	What will the fully diluted market cap of dYdX's token be 1 week after it starts trading?	Yes	$70.5K	Unknown	Details

#	Market	Result	Volume	Resolved
1	Will the Democratic party win the governorship in Washington 2 outcomes	Democratic party	$18.7K	Nov 7, 2029	Details
2	Will Democratics win the Senate race in Vermont? 2 outcomes	Democratic party	$6.3K	Nov 7, 2029	Details
3	Will the Republican party win the governorship in Montana 2 outcomes	Republican	$3.3K	Nov 7, 2029	Details
4	Will Democratics win the Senate race in Maryland? 2 outcomes	Democratic party	$1.4K	Nov 7, 2029	Details
5	Will the Republican party win the governorship in West Virginia 2 outcomes	Republican	$867	Nov 7, 2029	Details
6	Will Democratics win the Senate race in Colorado? 2 outcomes	Democratic party	$147	Nov 7, 2029	Details
7	Will the Democratic party win the governorship in Delaware 2 outcomes	Democratic party	$84	Nov 7, 2029	Details
8	Will it be reported that the White House State Ballroom is completed and holds an event before Jan 1, 2029?	Before 2029	$418	Jan 1, 2029	Details
9	What will the fully diluted market cap of dYdX's token be 1 week after it starts trading?	Yes	$70.5K	Unknown	Details

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