Practitioners — Lawyers · updated 2026-06-11

Finding#7 . NPRM-stage CPI-U buying-power figures invented (verbatim-quote request)

RLB Citation ID: RLB-F-US-CFTC-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-Q020

What the RLB Specialist Panel found

Finding#7 . NPRM-stage CPI-U buying-power figures invented (verbatim-quote request)

Citation ID: RLB-H-US-CFTC-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-Q020-Sonnet46
AI's failure: AI invented February-2023 figures in a CCO briefing memo where the NPRM records different figures
Risk for the Lawyers: Operational decision-support exposure on CCO briefing memos that quote AI-supplied NPRM-era figures For lawyers working on CFTC Regulation 4.7 matters, the AI's stated answer reads as a verbatim quotation that a practitioner would paste into a memo, register entry, or client deliverable before verification against the source. The regulator's own text, however, records a different position. The NPRM records, using CPI-U data as of February 2023, that the $2,000,000 threshold has the same buying power as approximately $4,270,000, and the $200,000 threshold has the same buying power as approximately $427,000. Sonnet 4.6, asked to quote both NPRM-era figures verbatim, produced $4,070,000 and $407,000. The answer is the same fabrication pattern as Finding 11: a coherent NPRM-stage paragraph anchored on figures that the NPRM does not record. For a lawyer drafting on this question, the immediate risk is that the AI's answer enters a client memo, board briefing, or transactional opinion without verification, and that the inconsistency surfaces later under counterparty review, regulatory inquiry, or internal QC.
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References — raw findings (per AI model)

RLB-H-US-CFTC-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-Q020-Sonnet46 Claude Sonnet 4.6 (web search on)

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Each finding has a stable Citation ID (RLB-F-… for aggregated case-study findings, RLB-H-… for raw per-model hallucinations) — like a DOI, the ID always resolves to the canonical finding even if URLs change.

RLB Citation ID: RLB-F-US-CFTC-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-Q020

Bluebook / OSCOLA (US + UK legal) Download

RegLeg Specialist Panel, Finding#7 . NPRM-stage CPI-U buying-power figures invented (verbatim-quote request) [RLB-F-US-CFTC-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-Q020], RegLegBrief AI Hallucination Research (June 11, 2026), https://reglegbrief.com/regulators/j3/us/cftc/cpo-cta-regulation-4-7-qep-thresholds-2024/practitioners/lawyers/finding/US-CFTC-US-001-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-v1-020/.

Plain text Download

RegLeg Specialist Panel (2026). "Finding#7 . NPRM-stage CPI-U buying-power figures invented (verbatim-quote request) — Practitioners — Lawyers." Citation ID: RLB-F-US-CFTC-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-Q020. RegLegBrief AI Hallucination Research, published 2026-06-11. https://reglegbrief.com/regulators/j3/us/cftc/cpo-cta-regulation-4-7-qep-thresholds-2024/practitioners/lawyers/finding/US-CFTC-US-001-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-v1-020/

APA 7th edition Download

RegLeg Specialist Panel. (2026). Finding#7 . NPRM-stage CPI-U buying-power figures invented (verbatim-quote request) [Hallucination finding RLB-F-US-CFTC-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-Q020]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/regulators/j3/us/cftc/cpo-cta-regulation-4-7-qep-thresholds-2024/practitioners/lawyers/finding/US-CFTC-US-001-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-v1-020/

BibTeX Download

@misc{reglegbrief_RLB_F_US_CFTC_CPO_CTA_REGULATION_4_7_QEP_THRESHOLDS_2024_Q020,
  author    = {RegLeg Specialist Panel},
  title     = {Finding#7 . NPRM-stage CPI-U buying-power figures invented (verbatim-quote request)},
  year      = {2026},
  publisher = {RegLegBrief AI Hallucination Research},
  note      = {Hallucination finding Citation ID: RLB-F-US-CFTC-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-Q020},
  url       = {https://reglegbrief.com/regulators/j3/us/cftc/cpo-cta-regulation-4-7-qep-thresholds-2024/practitioners/lawyers/finding/US-CFTC-US-001-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-v1-020/}
}

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