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AI Labs · Last updated 7 Jun 2026 · methodology vv2.3 · Hallucination Register

Finding on 'Q001 Probe' for Claude Opus 4.7 with web search ON

RLB Citation ID: RLB-H-US-CFTC-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-Q001-Opus47
What the RLB Specialist Panel found

Finding on 'Q001 Probe' for Claude Opus 4.7 with web search ON

  • Question (paraphrased to protect IP): An FCM operations guidance note on Regulation 1.44 margin call timing stated that Appendix A currencies (AUD, CNY, HKD, HUF, ILS, JPY, NZD, SGD, ZAR, TRY) have a one-additional-business-day (T+1) deadline and that all remaining non-USD fiat currencies default to same-day collection. Under §1.44(f)(2), the Appendix A deadline is the end of the second business day after the margin call is issued (T+2, not T+1), and §1.44(f)(3) provides a T+1 default for all other non-USD, non-Canadian-dollar fiat currencies, not same-day. The response collapsed three distinct regulatory tiers into two.
  • AI's response: "For margin called in a fiat currency other than USD, the deadline may be extended by up to one additional business day… For all other non-USD currencies, default to same-day (T)"
  • Regulator's text: Payment of margin in currencies listed in appendix A to this part shall be considered in compliance with the requirements of this paragraph (f) if received by the applicable futures commission merchant no later than the end of the second business day after the day on which the margin call is issued.
  • Why the AI went wrong: The regulation establishes three operationally distinct tiers, same-day for USD and Canadian dollars, T+2 for Appendix A currencies, and T+1 for all remaining non-USD/non-CAD fiat currencies, but the model compressed this into two tiers, misreporting the Appendix A deadline as T+1 and collapsing the T+1 default into same-day. The pattern is consistent with retrieval of third-party summaries that had already incorrectly simplified the tiered structure: the model's web-search configuration sourced a paraphrased distillation rather than the regulator's text, and the distillation had blurred the distinction between §1.44(f)(2) and §1.44(f)(3).
  • Cited source(s):
Impact for this audience

The model's collapse of Regulation 1.44(f)'s three-tier currency deadline structure into two tiers — Appendix A currencies at T+1, all other non-USD fiat at same-day — implicates the training-data representation of the regulation: the two-tier reconstruction matches the format of third-party law-firm summary content that pre-dates or simplifies the rule's actual T+2 Appendix A tier, while the correct end-of-second-business-day deadline is the specific detail that distinguishes the regulation from the model's prior. The retrieval-augmented generation layer either did not surface §1.44(f)(2) verbatim, or did surface it but failed to override the model's prior toward the simpler two-tier schema.

On re-probe, the model corrected to the three-tier structure — confirming the correct mapping was reachable. This is a calibration failure in how primary regulatory text is weighted against summary-content priors at generation time.

References — raw findings (per AI model)
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RLB Citation ID: RLB-H-US-CFTC-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-Q001-Opus47
Plain text Download 
RegLeg Specialist Panel (2026). "Finding on 'Q001 Probe' for Claude Opus 4.7 with web search ON — AI Labs." Citation ID: RLB-H-US-CFTC-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-Q001-Opus47. RegLegBrief AI Hallucination Research, published 2026-06-07. https://reglegbrief.com/regulators/j3/us/cftc/fcm-margin-adequacy-separate-accounts-reg-1-44/whitepaper/finding/US-CFTC-US-001-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-v1-001--opus-47-websearch/
APA 7th edition Download 
RegLeg Specialist Panel. (2026). Finding on 'Q001 Probe' for Claude Opus 4.7 with web search ON [Hallucination finding RLB-H-US-CFTC-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-Q001-Opus47]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/regulators/j3/us/cftc/fcm-margin-adequacy-separate-accounts-reg-1-44/whitepaper/finding/US-CFTC-US-001-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-v1-001--opus-47-websearch/
Bluebook / OSCOLA (US + UK legal) Download 
RegLeg Specialist Panel, Finding on 'Q001 Probe' for Claude Opus 4.7 with web search ON [RLB-H-US-CFTC-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-Q001-Opus47], RegLegBrief AI Hallucination Research (June 07, 2026), https://reglegbrief.com/regulators/j3/us/cftc/fcm-margin-adequacy-separate-accounts-reg-1-44/whitepaper/finding/US-CFTC-US-001-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-v1-001--opus-47-websearch/.
BibTeX Download 
@misc{reglegbrief_RLB_H_US_CFTC_FCM_MARGIN_ADEQUACY_SEPARATE_ACCOUNTS_REG_1_44_Q001_Opus47,
  author    = {RegLeg Specialist Panel},
  title     = {Finding on 'Q001 Probe' for Claude Opus 4.7 with web search ON},
  year      = {2026},
  publisher = {RegLegBrief AI Hallucination Research},
  note      = {Hallucination finding Citation ID: RLB-H-US-CFTC-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-Q001-Opus47},
  url       = {https://reglegbrief.com/regulators/j3/us/cftc/fcm-margin-adequacy-separate-accounts-reg-1-44/whitepaper/finding/US-CFTC-US-001-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-v1-001--opus-47-websearch/}
}
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