Which agency downgraded USDT stability?

TLDR

S&P Global Ratings downgraded USDTs stability assessment. S&P Global Ratings

1. The score moved to 5 (weak), the lowest on S&Ps stablecoin stability scale. Yahoo Finance report
2. The downgrade cited higher exposure to riskier reserves and ongoing disclosure gaps. The Block analysis

Deep Dive

1. What Changed

USDTs stability rating was lowered to 5 (weak), the bottom of S&Ps five-point scale. This is a downgrade from 4 (constrained) issued previously. Yahoo Finance report

S&Ps scale reflects perceived ability to maintain the dollar peg under stress. 5 (weak) signals elevated risk relative to peers on that metric. Cointelegraph coverage

2. Why It Matters

S&P highlighted that riskier reserve assets have grown, including Bitcoin and gold, alongside secured loans and corporate bonds, while disclosure gaps persist. The Block analysis

The agency noted Bitcoin exposure around 5.6% versus an overcollateralization buffer near 3.9%, implying a sharp BTC drawdown could erode reserve coverage and pressure the peg. Cointelegraph coverage

Tethers leadership disputed the methodology and conclusions, but the downgrade still raises a monitoring flag for reserve composition, transparency cadence, and stress-redemption conditions. Yahoo Finance report

Conclusion

S&P Global Ratings issued the downgrade on USDT, pointing to a higher share of volatile assets and transparency gaps as key drivers. In practice, this is a risk-monitoring signal rather than a prediction of failure. The actionable takeaway is to watch reserve disclosures and market behavior during stress rather than headlines alone.