S&P Downgrade of USDT Sparks Panic in China’s Underground Crypto Scene

S&P Global Ratings has downgraded Tether’s USDT stability score from “constrained” to “weak,” a move that immediately ignited intense debate across Chinese social media platforms and raised fresh questions about the world’s largest stablecoin at a critical moment for one of its biggest user bases.

The downgrade, announced Wednesday, cited rising exposure to volatile assets such as Bitcoin and broader concerns about transparency. 

For China’s estimated 20 million underground crypto participants—who rely heavily on USDT as a gateway to digital asset markets despite an ongoing national ban—the timing could not be worse.

Also read: Stablecoin Market Smashes $318 Billion Record as USDC and USDT Dominate

S&P Sounds the Alarm on Tether Reserve Risks

S&P’s report focused heavily on Tether’s reserve composition, calling out what it described as a widening mismatch between the stablecoin’s risk profile and its stated stability claims. 

According to the agency, Bitcoin now accounts for 5.6% of circulating USDT, surpassing Tether’s previously stated buffer of 3.9% intended to protect against volatility.

Tether’s own attestation reports for Q1–Q3 2025 detail $9.9 billion in Bitcoin and $12.9 billion in gold, leaving roughly 13% of total reserves tied to volatile or higher-risk assets. These figures back a liability base of $174.4 billion, with Tether reporting $181.2 billion in total reserves and more than $10 billion in profit generated in the first three quarters of the year.

S&P acknowledged Tether’s sizable holdings of U.S. Treasuries—more than $113 billion, by Tether’s latest transparency release—but said the presence of secured loans, corporate debt, and precious metals contributed to a riskier portfolio than previously understood. 

The agency also flagged ongoing gaps in disclosure practices, warning that limited visibility into reserve details increases uncertainty around USDT’s long-term peg stability.

Chinese Traders Split Between Calm, Concern, and Conspiracy

The downgrade immediately trended on Weibo and WeChat, where crypto traders in China often gather to share leaked exchange data, market predictions, and regulatory updates. In these circles, USDT is not just another token—it is the foundational asset keeping the entire underground market functioning.

Reactions were sharply mixed. Some veteran traders dismissed the report as another routine scare that would ultimately fade without consequence.

Others were far more alarmed.

“If this bomb goes off, the cryptocurrency market is completely finished!” one user warned in a widely shared Weibo post.

The panic was amplified by the sizeable share of China’s crypto market that conducts trades exclusively through USDT-denominated pairs. With centralized exchanges banned in mainland China, most trading activity depends on offshore platforms and OTC desks that use USDT as the primary entry point for yuan conversion.

The controversy also sparked conspiracy theories. Several users suggested, without evidence, that rivals such as USDC and USD1 might be orchestrating fear campaigns to weaken Tether’s dominance—claims that reflect longstanding tensions in the stablecoin sector as global scrutiny intensifies. 

Supporters of USDC seized the moment to argue that better regulatory oversight and clearer disclosures make it a more reliable alternative.

A Stress Test for China’s Shadow Crypto Economy

Despite Beijing’s sweeping crackdown—starting with ICO restrictions in 2017 and culminating in the 2021 ban on all crypto transactions and mining—China’s digital asset activity never disappeared. Instead, it moved offshore and underground.

Research indicates that over 20 million Chinese citizens held Bitcoin as of 2024. They navigate the restrictions through VPNs, overseas exchanges, OTC networks, and private trading groups. USDT serves as the critical bridge, enabling the conversion of yuan into dollar-pegged liquidity needed to participate in global markets.

That reliance explains why S&P’s downgrade struck such a nerve. The Chinese market’s dependence on USDT means that even a perception of weakness could trigger cascading instability—particularly in a sector where users lack legal protections, regulated on-ramps, or enforcement mechanisms.

For now, Tether continues to assert that its reserves are fully backed, liquid, and stronger than ever. But within China’s vast, unofficial crypto economy, confidence—not just collateral—is the real currency. And this week, that confidence has taken a hit.