The decentralized finance (DeFi) protocol Neutrl has suspended operations for its NUSD synthetic dollar, halting all minting and redemptions in response to undisclosed circumstances that have affected its reserves. The precise cause and the full extent of any potential impairment remain unclear.

In an announcement on Thursday, Neutrl confirmed that it had also paused other protocol functions while it assesses the impact, a decision made based on legal advice. The protocol has not identified the specific asset or counterparty involved, nor has it clarified whether its reserves have suffered a realized loss. A timeline for the resumption of services has not been provided.

This suspension directly impacts the roughly $53.6 million of NUSD currently in circulation. Approved counterparties are now prevented from exchanging the token for its underlying backing assets as Neutrl works to determine if its reserves have been compromised. The team stated that it would release information on "timing and next steps when available."

The disruption has had ripple effects, with the structured-yield protocol Strata subsequently announcing that it paused minting, redemptions, and related functions for contracts in its Neutrl market. This market supports several products linked to NUSD. Strata clarified that its other markets were unaffected and continue to operate normally.

A request for comment sent to Neutrl by Cointelegraph did not receive a reply before this article was published.

Market and Asset Overview

According to data from RWA.xyz on Friday, NUSD's market capitalization stood at approximately $53.6 million, representing an 18.4% decline over the past 30 days. During the same period, monthly transfer volume plummeted by 72.4% to $71.4 million. However, the available data does not establish a direct link between this earlier market contraction and the current reserve issue.

The NUSD synthetic dollar is engineered to track the value of the U.S. dollar by using a combination of yield-bearing crypto assets and market-neutral strategies, rather than relying on traditional deposits held in a bank. RWA.xyz data showed NUSD trading at about $0.9984. Over the preceding 30 days, the token had 615 holders and 347 active addresses.

Contrasting Assessments of Protocol Risk

The suspension comes just weeks after a positive report from the verification platform Accountable. On May 25, the platform stated that its Neutrl dashboard provided "continuous cryptographic proof that NUSD reserves matched the protocol’s liabilities."

However, a February assessment from the risk-advisory team BA Labs had previously classified a proposed Neutrl integration as a "higher risk" endeavor. The team cited concerns related to counterparty, operational, and liquidity exposure. Its report highlighted that direct redemptions were restricted to counterparties with Know Your Customer (KYC) or Know Your Business (KYB) approval. Furthermore, the assessment noted that any redemption requests exceeding the protocol's liquid buffer could be placed into a queue with a target completion of 48 hours, though this was not guaranteed.

At the time of its February analysis, BA Labs estimated the NUSD supply at $226 million, backed by $233.7 million in reserves, implying a collateralization ratio of 103.6%. The report also found that more than 87% of these reserves were held through the digital asset platform Fireblocks, with smaller amounts distributed across various centralized exchanges.