AI subject tested: Claude Sonnet 4.6 (web search on)
Question (paraphrased): An FCM began accepting bitcoin, ether, and USDC as customer margin collateral in January 2026 under the CFTC's digital asset pilot. At the end of the initial three-month phase, does the weekly obligation to report total digital asset holdings in each customer account class cease or continue, and which other initial-phase conditions do sunset at that point?
AI response:
"3. Weekly Digital Asset Reporting (CEASES at end of third calendar month following notice filing)... Based on the March 2026 CFTC Staff FAQs, this reporting terminates at the end of the third calendar month following the firm's notice filing."
Regulator verbatim text:
"However, weekly reporting of digital asset holdings continues: 'Weekly reports of total crypto assets held in each of the futures, foreign futures, and cleared swaps customer accounts' — this obligation is not among the conditions that sunset after 3 months."
Failure mode: inference_drift
Substrate document: p_02_GUIDELINE_CFTC_Staff_Letters_25_40___26_05___post_download.pdf
This finding documents a confirmed hallucination by Claude Sonnet 4.6 (web search on) on a probe of the regulation. The model's response was tested against the regulator's verbatim primary text and classified as inference_drift. Full per-finding context is available via the linked Citation ID.
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). "An FCM began accepting bitcoin, ether, and USDC as customer margin collateral in January 2026 under the CFTC's digital a — AI Labs." Citation ID: RLB-H-US-CFTC-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-Q006-Sonnet46. RegLegBrief AI Hallucination Research, published 2026-06-07. https://reglegbrief.com/regulators/j3/us/CFTC/DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025/whitepaper/finding/US-CFTC-US-001-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-v1-006--sonnet-46-websearch/
RegLeg Specialist Panel. (2026). An FCM began accepting bitcoin, ether, and USDC as customer margin collateral in January 2026 under the CFTC's digital a [Hallucination finding RLB-H-US-CFTC-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-Q006-Sonnet46]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/regulators/j3/us/CFTC/DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025/whitepaper/finding/US-CFTC-US-001-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-v1-006--sonnet-46-websearch/
RegLeg Specialist Panel, An FCM began accepting bitcoin, ether, and USDC as customer margin collateral in January 2026 under the CFTC's digital a [RLB-H-US-CFTC-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-Q006-Sonnet46], RegLegBrief AI Hallucination Research (June 07, 2026), https://reglegbrief.com/regulators/j3/us/CFTC/DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025/whitepaper/finding/US-CFTC-US-001-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-v1-006--sonnet-46-websearch/.
@misc{reglegbrief_RLB_H_US_CFTC_DIGITAL_ASSET_COLLATERAL_TOKENIZED_ASSETS_STAFF_GUIDANCE_2025_Q006_Sonnet46,
author = {RegLeg Specialist Panel},
title = {An FCM began accepting bitcoin, ether, and USDC as customer margin collateral in January 2026 under the CFTC's digital a},
year = {2026},
publisher = {RegLegBrief AI Hallucination Research},
note = {Hallucination finding Citation ID: RLB-H-US-CFTC-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-Q006-Sonnet46},
url = {https://reglegbrief.com/regulators/j3/us/CFTC/DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025/whitepaper/finding/US-CFTC-US-001-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-v1-006--sonnet-46-websearch/}
}
Every finding on this page compares an AI subject's account of the rule against the regulator's verbatim text from the regulator's own portal. Both are linked. Each delta, its root causes, and impact analysis are documented and published with immutable Citation IDs.