Under the 2024 Regulation 1.25 amendments, what dollar-weighted average maturity standard applies to the overall portfolio of customer segregated funds, and which investment types are excluded from that calculation?
The model reproduced the 24-month ceiling correctly but appended a cross-regulatory methodology reference — SEC Rule 2a-7's WAM computation standard — that does not appear in the CFTC rule. This is a training-side cross-contamination: SEC Rule 2a-7's WAM methodology is a highly prominent concept in money market fund regulation, and the model appears to have grafted it onto the CFTC's maturity limit as a plausible-sounding elaboration. The CFTC rule specifies its own computation scope via exclusions; it does not incorporate 2a-7 by reference.
This finding implicates cross-regulator concept conflation in the training data. The model correctly retrieved the 24-month WAM ceiling but appended SEC Rule 2a-7's computation methodology as an elaboration — a cross-contamination that occurs when two regulators' frameworks share vocabulary and are trained in close proximity without independence annotations. The error is in the generation layer: the model added a plausible-sounding methodology reference not present in the retrieved CFTC rule text.
An AI assistant that correctly states the 24-month WAM ceiling but omits the exclusion of government money market funds, Treasury ETFs, and foreign sovereign debt from the calculation delivers a materially incomplete rule description. A Treasury team building its duration-management framework or segregated-portfolio monitoring on that description will miscalibrate the effective constraint on the non-excluded portion of the portfolio.
If the excluded instruments represent a significant share of the segregated-fund allocation — which is common in a Reg 1.25-compliant portfolio weighted toward government money market funds — the practical headroom in the WAM metric is understated, and the firm's monitoring regime is testing against a tighter ceiling than the regulation requires. Alternatively, if the team interprets the AI's version as the full rule and does not separately document the exclusion, internal audit and CFTC examiners testing the WAM calculation methodology will find an incomplete implementation of the amended provision.
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.
RegLeg Specialist Panel (2026). "Finding#2 — WAM ceiling — exclusion clause omitted — Investment Banking × Treasury — United States." Citation ID: RLB-F-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q002. RegLegBrief AI Hallucination Research, published 2026-06-04. https://reglegbrief.com/regulators/j3/us/cftc/fcm-dco-customer-funds-investments-reg-1-25-2024/sectors/investment_banking/treasury/finding/US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-002/
RegLeg Specialist Panel. (2026). Finding#2 — WAM ceiling — exclusion clause omitted [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/investment_banking/treasury/finding/US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-002/
RegLeg Specialist Panel, Finding#2 — WAM ceiling — exclusion clause omitted [RLB-F-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q002], RegLegBrief AI Hallucination Research (June 04, 2026), https://reglegbrief.com/regulators/j3/us/cftc/fcm-dco-customer-funds-investments-reg-1-25-2024/sectors/investment_banking/treasury/finding/US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-002/.
@misc{reglegbrief_RLB_F_US_CFTC_FCM_DCO_CUSTOMER_FUNDS_INVESTMENTS_REG_1_25_2024_Q002,
author = {RegLeg Specialist Panel},
title = {Finding#2 — WAM ceiling — exclusion clause omitted},
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/investment_banking/treasury/finding/US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-002/}
}