Hedge Funds × Compliance — United States · updated 2026-06-11

Finding#3: DWAM exclusion inverted: Treasury repos swapped in for actual carve-outs (Opus 4.7)

RLB Citation ID: RLB-F-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q002

What the RLB Specialist Panel found

Finding#3: DWAM exclusion inverted: Treasury repos swapped in for actual carve-outs (Opus 4.7)

Citation ID: RLB-F-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q002-Opus47
AI's failure: AI swapped the rule's carve-out asset classes for an adjacent unrelated class
Risk for Compliance at Hedge Funds: Regulatory enforcement exposure when the AI-shaped output drives a breach of 17 CFR 1.25
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Impact for Compliance Teams in Hedge Funds Sector in the United States working with the Amendments to Regulation 1.25, Permissible Investments of Customer Funds by Futures Commission Merchants and Derivatives Clearing Organizations

For Compliance teams at Hedge Funds firms working on FCM and DCO customer-funds investment policy, segregation testing, and SIDR scheduling work in the United States, the inverted DWAM carve-out misdirects portfolio testing toward an asset class the rule does not exclude (U.S. Treasury repos) while omitting the asset classes the rule does exclude (government money market funds, Treasury ETFs, and foreign sovereign debt). A compliance teams at hedge funds firms who applies the model output to denominator construction or compliance testing would simultaneously over-include carved-out classes and under-include included ones.

The error surface is exactly where verification is least likely: the headline 24-month number is correct, so the carve-out clause passes a quick numeric check. Independent verification against 17 CFR 1.25(b)(3)(iv) is the only reliable safeguard.

References — raw findings (per AI model)

RLB-H-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q002-Opus47 Claude Opus 4.7 (web search on)
RLB-H-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q002-Sonnet46 Claude Sonnet 4.6 (web search on)

This finding also affects

← Previous finding Finding#2: Concentration limits: trigger elision plus fabricated tier (Sonnet 4.6) Next finding → Finding#4: DWAM no-standard answer on direct Treasuries (Sonnet 4.6)

Cite this finding

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-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q002

Plain text Download

RegLeg Specialist Panel (2026). "Finding#3: DWAM exclusion inverted: Treasury repos swapped in for actual carve-outs (Opus 4.7) — Hedge Funds × Compliance — United States." Citation ID: RLB-F-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q002. RegLegBrief AI Hallucination Research, published 2026-06-11. https://reglegbrief.com/regulators/j3/us/cftc/fcm-dco-customer-funds-investments-reg-1-25-2024/sectors/hedge_funds/compliance/finding/US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-002/

APA 7th edition Download

RegLeg Specialist Panel. (2026). Finding#3: DWAM exclusion inverted: Treasury repos swapped in for actual carve-outs (Opus 4.7) [Hallucination finding RLB-F-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q002]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/regulators/j3/us/cftc/fcm-dco-customer-funds-investments-reg-1-25-2024/sectors/hedge_funds/compliance/finding/US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-002/

Bluebook / OSCOLA (US + UK legal) Download

RegLeg Specialist Panel, Finding#3: DWAM exclusion inverted: Treasury repos swapped in for actual carve-outs (Opus 4.7) [RLB-F-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q002], RegLegBrief AI Hallucination Research (June 11, 2026), https://reglegbrief.com/regulators/j3/us/cftc/fcm-dco-customer-funds-investments-reg-1-25-2024/sectors/hedge_funds/compliance/finding/US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-002/.

BibTeX Download

@misc{reglegbrief_RLB_F_US_CFTC_FCM_DCO_CUSTOMER_FUNDS_INVESTMENTS_REG_1_25_2024_Q002,
  author    = {RegLeg Specialist Panel},
  title     = {Finding#3: DWAM exclusion inverted: Treasury repos swapped in for actual carve-outs (Opus 4.7)},
  year      = {2026},
  publisher = {RegLegBrief AI Hallucination Research},
  note      = {Hallucination finding Citation ID: RLB-F-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q002},
  url       = {https://reglegbrief.com/regulators/j3/us/cftc/fcm-dco-customer-funds-investments-reg-1-25-2024/sectors/hedge_funds/compliance/finding/US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-002/}
}

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