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$YESNO

Prediction market volume

$595.19Min fees1.2% upon the day before

Sep 30Recorded at 12:40 UTC

Quiet. $595.19M on Sep 30, up 1.2% on the day before.

$500.00M$600.00M$700.00M$800.00M

From Sep 1 to Sep 30.

Normal$536.45M to $654.63M
Highest$862.47MSep 20
Unusual days4

Call it

All of the Arena
$YESNO

Prediction market volume

Closes in--:--:--

Oct 2

$595.19M to beat

Dollars on Sep 30. Oct 1 prints tomorrow.

See

Counts
Dollars traded per day on Kalshi and Polymarket, added together, as DefiLlama counts each venue's notional volume.
Adds up
Kalshi, Polymarket
Source
DefiLlama, daily notional volume of Kalshi and Polymarket
Terms
DefiLlama open API. Volumes are computed and published by DefiLlama; Tickerz adds the two venues once an hour.
Cadence
Daily, one day late. Newest complete day Sep 30. Read Oct 1, 04:40 UTC.
Baseline
The prior 30 days, 14 needed.
Notice
Volume figures are computed and published by DefiLlama.

Resolution

Index
$YESNO Prediction market volume. Rulebook v0.1, 2026-09-23.
Prints
Daily, one day late. The newest complete day is on the record after the daily proof at about 12:00 UTC.
First print

2026-09-30 is not on-chain yet. The daily proof at about 12:00 UTC puts it on the record.

The first print is final for settlement; revisions are shown beside it and never replace it.

Fallback
DefiLlama publishes a day about a day late. Until both venues have the day, it stays open and nothing settles. A day that never lands is void.
Precision
US dollars of notional volume, as DefiLlama reports each venue, summed and rounded to the cent.
Cost to move
Expensive. Adding a dollar of volume means trading a dollar of contracts on Kalshi or Polymarket.
Grade
candidate. Money traded on two venues, one regulated by the CFTC. Moving the number means trading, and paying the venues' fees, in public. The source's terms for this use are being cleared.
For a rulebook
Settle on the Tickerz first print of $YESNO for the UTC day named in the contract, published at tickerz.com/x/yesno and in GET /api/indices/yesno, put on-chain daily with OpenTimestamps.

Arena

$YESNO for Oct 2. Forecast the print.

Against Sep 30: $595.19M. Graded on the first print. Points only, no money. The question, the standings and the rules.

Listed names

Listed names in the same business. No link to this index has been measured. The outlined ones are on the Terminal and open their page. Plain links, nothing paid.