---
type: "AIHallucinationFinding"
title: "What dollar-weighted average maturity limit applies to an FCM's overall portfolio of customer…"
citation_id: "RLB-H-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q002-Opus47"
finding_uid: "US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-002--opus-47-websearch"
question_uid: "US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-002"
regulation_id: "US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024"
regulation_slug: "FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024"
regulation_title: "Amendments to Regulation 1.25 — Permissible Investments of Customer Funds by Futures Commission Merchants and Derivatives Clearing Organizations"
regulator_short_code: "CFTC"
regulatory_body_id: "CFTC-US-001"
jurisdiction_code: "US"
j_level: "J3"
ai_subject: "claude-opus-4-7"
ai_subject_display: "Claude Opus 4.7 (web search on)"
ai_subject_version: "opus-47-websearch"
response_failure_mode: "inference_drift"
substrate_document_name: "p_03_REGULATION_17_CFR_1_25_b__3__iv____dollar_weighted_download.pdf"
substrate_document_path: "https://reglegbrief.com/substrate/US/CFTC/FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024/_raw_manual_substrate/p_03_REGULATION_17_CFR_1_25_b__3__iv____dollar_weighted_download.pdf"
substrate_section_anchor: "17 CFR 1.25(b)(3)(iv) — dollar-weighted average portfolio maturity limit: 24 months for general portfolio"
citation_issue_types: ["Contradictory"]
audiences: ["ai_labs"]
published_at: "2026-06-07T07:59:00.913358+00:00"
substrate_version: 1
methodology_version: "2.3"
license: "CC-BY-4.0"
resource: "https://reglegbrief.com/regulators/j3/us/cftc/FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024/ai-labs/finding/US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-002--opus-47-websearch/"
tags: ["ai-hallucination", "inference_drift", "cftc", "fcm-dco-customer-funds-investments-reg-1-25-2024", "us"]
timestamp: "2026-06-16T00:00:00+00:00"
---

# AI Hallucination Finding: What dollar-weighted average maturity limit applies to an FCM's overall portfolio of customer…

- **Citation ID.** `RLB-H-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q002-Opus47`
- **Finding UID.** `US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-002--opus-47-websearch`
- **Regulation.** [`FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024`](/okf/regulations/FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024.md) — Amendments to Regulation 1.25 — Permissible Investments of Customer Funds by Futures Commission Merchants and Derivatives Clearing Organizations
- **Regulator.** [`CFTC-US-001`](/okf/bodies/CFTC-US-001.md) — Commodity Futures Trading Commission
- **AI subject.** Claude Opus 4.7 (web search on)
- **Failure mode.** [`inference_drift`](/okf/taxonomy/failure-modes.md)
- **Published.** 2026-06-07T07:59:00.913358+00:00

## Question put to the AI subject

What dollar-weighted average maturity limit applies to an FCM's overall portfolio of customer segregated fund investments under the 2024 Regulation 1.25 amendments, and which asset classes are excluded from that portfolio-level calculation?

## AI subject's verbatim answer

with U.S. Treasuries held under repurchase agreements excluded from the calculation

## Verbatim regulator text contradicting the answer

> The dollar-weighted average of the time-to-maturity of the portfolio may not exceed 24 months. This limit excludes government money market funds, Treasury ETFs, and foreign sovereign debt from the calculation.

_Source:_ [p_03_REGULATION_17_CFR_1_25_b__3__iv____dollar_weighted_download.pdf](https://reglegbrief.com/substrate/US/CFTC/FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024/_raw_manual_substrate/p_03_REGULATION_17_CFR_1_25_b__3__iv____dollar_weighted_download.pdf)
_Section anchor:_ 17 CFR 1.25(b)(3)(iv) — dollar-weighted average portfolio maturity limit: 24 months for general portfolio

## Failure mode

**`inference_drift`** — Inference drift — the AI inferred a conclusion the regulator's text does not warrant, often by combining unrelated provisions.

## Citation-issue types

- **Contradictory** — <https://www.federalregister.gov/documents/2025/01/22/2024-30927/investment-of-customer-funds-by-futures-commission-merchants-and-derivatives-clearing-organizations>
- **Contradictory** — <https://www.cftc.gov/media/11516/Regulation_1_25_FactSheetandQA121724/download>
- **Contradictory** — <https://www.willkie.com/publications/2025/01/cftc-amends-regulation-on-the-investment-of-customer-funds>
- **Contradictory** — <https://www.morganlewis.com/pubs/2025/01/cftc-adopts-amendments-to-permissible-customer-funds-investments-by-fcms-and-dcos>

## Related concepts

- Regulation: [FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024](/okf/regulations/FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024.md)
- Regulator: [CFTC-US-001](/okf/bodies/CFTC-US-001.md)
- Failure-mode taxonomy: [inference_drift](/okf/taxonomy/failure-modes.md)
- Methodology: [v2.3](/okf/methodology.md)
- Editorial standards: [right of reply](/okf/editorial-standards.md)

## Reproduction

Citation ID: `RLB-H-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q002-Opus47`

Resource URL (HTML view of this finding):

<https://reglegbrief.com/regulators/j3/us/cftc/FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024/ai-labs/finding/US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-002--opus-47-websearch/>

This finding is reproducible against the substrate document linked above, using the same AI subject, the same methodology version, and the verbatim question text.