What is the “March Madness: 9 first round upsets?” market asking?

It asks whether the following will happen: March Madness: 9 first round upsets? It is one of the markets in the Polymarket event “How many upsets in first round of NCAA Tournament?”. Traders buy Yes shares if they think it will and No shares if they think it will not.

What do the Yes and No prices mean?

At the last observation Yes traded at 0.0¢ and No at 100.0¢. A Yes share pays $1 if the market resolves Yes, so its price is the market's implied probability: 0.0% for Yes and 100.0% for No. The two prices add up to about one dollar.

How did this market resolve?

It resolved No on 22 Mar 2025. Trading has stopped; the record of prices, holders and trades stays on this page.

How does this market resolve?

This market will resolve based on the number of “upsets” that occur in the first round of the 2025 March Madness Tournament. An “upset” is defined as a team with a lower seed that defeats a team with a higher seed. First Four play-in games will not count for the resolution of this market. If for any reason the first round is not completed by May 31, 2025, 11:59 PM ET, this market will resolve to "other". The resolution source for this market will be information from the NCAA. Resolution source: https://www.ncaa.com/march-madness-live/bracket.

What is the difference between volume, liquidity and open interest?

Volume is the dollar value of shares traded in a period, liquidity is the dollar value resting in the order book ready to be traded against, and open interest is the value of all shares currently held. Volume measures activity, liquidity measures how easily you can trade, and open interest measures how much is at stake.

Who still holds shares in this market?

1 public wallets still held shares when Vultax last looked. Winners usually redeem their shares after settlement, so the remaining holders are mostly on the losing side.

Where does this data come from and how fresh is it?

Prices, the order book, holders and the trade tape come from Polymarket's public order book and data API. Vultax records each observation with its own timestamp (market facts last updated Mar 23, 3:46 AM UTC) and shows a value as unavailable rather than as zero when a source has not answered.

Can I trade this market on Vultax?

No. Vultax is a research and paper-trading terminal; it does not execute orders. The trade controls open the official market on Polymarket (https://polymarket.com/event/how-many-upsets-in-first-round-of-ncaa-tournament) or the Vultax predictions monitor, where you can track the market and paper trade it.

Resolved No: March Madness: 9 first round upsets?

Market referencemarch-madness-9-first-round-upsetsUpdated Mar 23, 2025 UTC

Resolved

No · settled Mar 22, 2025 UTC

Yes

0.0%

100.0%

Final Yes 0¢Final No 100¢

Lifetime volume

$515

Resolved

Settled

Mar 22, 2025 UTC

Source Evidence

Evidence coverage

Items

Fetched

Latest

Mar 23, 2025 UTC

Public Polymarket market/event context is available; Vultax source-pack coverage is tracked separately.

Depth

Observed

Mar 23, 2025 UTC

This closed market has no live orderbook depth; the public close quote is shown for context.

Trading stateMarket usability at the displayed observation.

Market state

Resolved

Order book

Captured book available

Final outcome

The resolved venue state is treated as proof of resolution; holder and trade rows are settlement context.

Holder depthCapped public top-holder sample.

Rows loaded

Wallets

Top 10 share

100%

Yes / No shares

0 / 1.55K

Rows reflect the positive holders returned for this market, not venue-wide open interest.

Recent tapeLatest public market trades.

Trades loaded

Wallets

Loaded notional

$331.22

No buy at 93.0%

History rangePolymarket CLOB price history · daily closes · latest observation Mar 22, 12:00 AM UTC

Points

Move

+18 pts

Range

13.0% - 37.0%

Mar 16, 12:00 AM UTC to Mar 22, 12:00 AM UTC

TradesRecent market trade tape linked back into trader pages.

Full tapeCheckSubscriber depth access is checked only when requested, keeping the public page fast.

Trader	Side	Outcome	Price	Shares	Time
11122	buy	No	93.0%	25	Mar 22, 3:45 AM UTC
11122	buy	No

How many upsets in first round of NCAA Tournament?

Questions

Questions about this market

What is the “March Madness: 9 first round upsets?” market asking?: It asks whether the following will happen: March Madness: 9 first round upsets? It is one of the markets in the Polymarket event “How many upsets in first round of NCAA Tournament?”. Traders buy Yes shares if they think it will and No shares if they think it will not.
What do the Yes and No prices mean?: At the last observation Yes traded at 0.0¢ and No at 100.0¢. A Yes share pays $1 if the market resolves Yes, so its price is the market's implied probability: 0.0% for Yes and 100.0% for No. The two prices add up to about one dollar.
How did this market resolve?: It resolved No on 22 Mar 2025. Trading has stopped; the record of prices, holders and trades stays on this page.
How does this market resolve?: This market will resolve based on the number of “upsets” that occur in the first round of the 2025 March Madness Tournament. An “upset” is defined as a team with a lower seed that defeats a team with a higher seed. First Four play-in games will not count for the resolution of this market. If for any reason the first round is not completed by May 31, 2025, 11:59 PM ET, this market will resolve to "other". The resolution source for this market will be information from the NCAA. Resolution source: https://www.ncaa.com/march-madness-live/bracket.
What is the difference between volume, liquidity and open interest?: Volume is the dollar value of shares traded in a period, liquidity is the dollar value resting in the order book ready to be traded against, and open interest is the value of all shares currently held. Volume measures activity, liquidity measures how easily you can trade, and open interest measures how much is at stake.

Analytics

Trader

Side

Outcome

Price

Time

11122

buy

93.0%

Mar 22, 3:45 AM UTC

11122

buy