Audit: pmxt/v2

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What this page is for: the problems with this corpus and the evidence behind them. The files are on the download page, and what the columns mean is in the format notes.

What is wrong with this data

v2 holds nearly every hour in its span and not every market that traded.

• Coverage ratio 0.8707 against on-chain fills. The ratio is the share of the markets that actually traded in an hour, counted independently from on-chain fills, that have a book in this corpus for that same hour. 0.8707 means about 87 of every 100 do. Across the six hours we picked in advance for the audit, 2,703 traded markets have no book, and the gaps are non-phantom in all six. how the ratio is computed, and what it cannot tell you. the audit's check against on-chain fills, 2026-08-31
• On the seven hours it shares with AG6, v2 lacks 3.09% of the markets AG6 holds. AG6 lacks 0.55% of the markets v2 holds over the same hours. the audit's comparison of the market sets on the seven shared hours, 2026-08-31
• The number of markets it holds a book for grew about sixfold across its span. 19,431 to 117,945 per hour. Its coverage ratio also ranges widely across those six hours, 0.4524 on 2026-06-19T07 to 0.9939 on 2026-08-02T02, so the six-hour figure of 0.8707 describes no month it actually had. Quote v2 by hour. the audit's per-hour market counts and coverage ratios, 2026-08-31
• Nearly every hour in its span has a file. 2,834 hours hold a file and none is a zero-row object. hour census against the published v2 SHA256SUMS.txt, with object sizes, 2026-08-31

What each hour holds

This era is finished and nothing is still being written to it, so its contents can be stated once rather than watched. Every one of its 2,835 hourly files was measured: 203,725,609,087 rows. Files run from 2026-04-13T19 to 2026-08-10T00. The median file holds 75,350,296 rows; the largest holds 122,339,727.

No hour in this era is empty: the smallest holds 220,723 rows.

What was measured, and what was not

• Rows: measured. The row count in each file's own parquet footer, read directly from the object, 2,835 of 2,835 files, none unreadable. Measured 2026-09-04T23:09Z.
• What we hold matches what was published: measured. All 4,118 mirrored objects across both eras are byte-identical to the source's own published checksums, and this site publishes a checksum for every one of them.
• Whether those rows cover everything that traded: not measured for the era as a whole. Six drawn hours were graded against on-chain fills (the table below); the rest have not been, and six hours is not a population rate. Grading every hour needs a per-hour comparison that has not been built. Until it is, this is not measured.
• Whether an outage explains a thin hour: not observable here. Our incident record reaches back to 2026-08-18T06, which is after this era ended, so no hour of it can be checked against a published incident. Those hours are unobserved, which is not the same as uneventful.

Row counts read from each file's parquet footer by ranged request, one pass, 2026-09-04T23:09Z. The full per-hour table is kept as rows-2026-09-04T230900Z.tsv, sha256 23b7730dfb45ba8e.

Measured against the chain

Every figure here is measured against on-chain fills for the same hour, by a program that reads the chain and never reads this archive. Six hours were drawn, and which six was written down before anything was measured. Six hours is a floor, not a sample large enough to describe a corpus, so nothing here is a population rate.

Our own capture scored 1.0000 on the same check. This corpus is at 0.8707, so roughly 13 in every 100 markets that demonstrably traded have no book here at all. A low coverage number means the market is missing, not that the data is imprecise. A book that was never recorded cannot be rebuilt from anything downstream. See all four side by side.

Pre-registration 5ae4e8765d601145, draw 02a94091dea9c11f, measured 2026-08-31.

Markets held, against markets traded

A corpus holds books for many markets that nobody traded in a given hour. Those books are what let you ask about a quiet market, not only a busy one. This counts both sides for each drawn hour.

This corpus has no single figure. Across the drawn hours it runs from 5.1x to 33.7x, and in date order the direction is plain, so a median of 18.7x would describe no hour it actually had. It is shown by hour, oldest first.

Our own capture holds about 52 books for every market that traded; this one holds about 19, roughly 2.8 times fewer. What it holds can still be trusted: this is a statement about how much of the market it watched, not about whether what it recorded is right. See all four side by side.

Breadth is not completeness. This number says nothing about whether the markets that did trade have books; the coverage ratio above measures that. The two are computed from different counts and rank the four corpora in the same order.