Methodology Change Log
The record of changes to what the published series measure. Pending changes are announced with an estimated impact and a comment window; the realized impact is appended at the effective fixing. CCIR series are forward-only — no restatements. The Change Management Policy governs classification. Comments: research@ccir.io.
v2.3.1 — a quorum bound on the marketplace vote floor
The v2.3.0 vote floor applies source by source. In cells where most members are marketplace-class, it can remove most of the panel's votes at once and leave the headline to a small minority. From the 2026-08-19 fixing the floor carries a quorum bound. Where the floor would remove half or more of a cell's voters, the floored votes stand for that day. The full panel then prices the cell. Cells where floored sources are a minority follow v2.3.0 unchanged. The bound applies from the 2026-08-19 fixing itself. Two marketplace-tier cells first published that morning under v2.3.0 were re-published under the bound the same day, before the daily record closed. Forward-only; no prior series value is restated.
v2.3.0 — single-point marketplace medians no longer vote in the operator-equal aggregate
The headline is the median of per-source medians, one vote per source. At marketplace-class sources that vote can form over a single surviving listing when catalog churn empties the rest of the venue's cross-section — one host's asking price then moves the aggregate by a full source vote, and reverts when the listing rotates out. From the 2026-08-19 fixing, a marketplace-class source votes only on days its median formed over at least two distinct price points. The floor governs the vote alone: the source's rows still stand in every distribution field, count, and concentration measure, and a cell whose only sources are floored keeps its median unchanged. Forward-only; no series is restated.
v2.2.1 effective — realized decomposition
The additions announced 2026-07-15 took effect. Realized with/without on the effective fixing: $3.68 with (n = 14) vs $3.62 without (n = 12), +1.8% composition. Day-over-day +1.6% = +1.8% composition − 0.3% market; use $3.62 for the market leg across the boundary. The retirement contributed 0.0% by construction. No comments were received by the close.
Amended 2026-07-23: one flagged row — a price block whose hardware identity rested on page-markup inference — entered two A100 cells at this fixing contrary to the announcement's terms. Published headlines were unaffected (median-rule cells); the affected cells' count and maximum fields carried the row for one fixing. Rows carrying that flag are excluded from every cell from the 2026-07-24 fixing, forward-only. The operator's parent publishes an operational rate table that disambiguates the block's identity; the A100-80G on-demand rate enters from that surface at the venue-labeled price from 2026-07-24.
v2.2.1 — two sources proposed for the on-demand rate panel; one member retired
Two neocloud-class sources are proposed for the on-demand rate panel. One is a subsidiary of an existing member with a materially different live rate card, admitted as a separate venue (no splice). Estimated impact: the two entries largely offset (−3.0% and +5.0% alone). Realized with/without publishes at the effective fixing. Comments through 2026-07-22: research@ccir.io.
Amended 2026-07-16: one panel member is retired from the roster at the same fixing. The member has published no purchasable rates since before the panel froze and has never contributed an observation to a published cell; no series is affected.
v2.2.0 — two sources added to committed-term cells
Two sources with firm published term prices (1/3-month and 3-year tenors) join the committed-term cells. Enhanced per-region capture of hyperscaler reservation pricing (1/3/5-yr) begins as a cross-check surface with no separate panel vote. On-demand rows from term sources enter no on-demand cell.
Candidate-source observation begins
Capture-only observation of candidate sources (rate cards, committed-term surfaces, marketplace feeds) began under panel provenance rules. No candidate holds a panel vote; proposals follow the Change Management Policy.
v2.1.0 effective — realized decomposition
The addition announced 2026-07-10 took effect. Realized with/without on the effective fixing: $3.60 with (n = 12) vs $3.52 without (n = 11), +2.3% composition. Day-over-day +1.0% = +2.3% composition − 1.3% market; use $3.52 for the market leg across the boundary. No comments were received by the close.
v2.1.0 — one source added to the on-demand rate panel
One source posting guaranteed on-demand and interruptible H100 and B200 rates joins the neocloud panel. Its own capacity only: re-sold capacity of existing members is excluded, one operator one vote. A corporate affiliate remains a separate panel source while both rate cards stay live; no splice. Comments were open through 2026-07-14.
July 1–2 panel expansion — collection panel 31 → 41 sources
Eleven sources entered over 2026-07-01/02 and several cells stepped where new price levels entered. The steps are composition effects, not repricing; treat week-over-week comparisons across the boundary accordingly.
Fourth source enters the hyperscaler H100 US cell
A fourth source's on-demand H100 US rows began flowing 2026-07-02/03. The step is a composition effect — no panel source changed a posted rate on those dates.
v2.0.0 — first public methodology
Chip × operator-class × geography series grammar, operator-equal weighting, published headline-statistic rule, frozen panel roster. Every published row carries its methodology version.