2 Stablecoins 标普全球评级将Tether的USDT降至最低稳定等级，因其高风险资产敞口增加、储备透明度不足及维持美元锚定能力受质疑。
标普全球评级将Tether的USDT稳定币降至最低稳定性等级，原因是其对比特币、黄金、担保贷款和公司债券等高波动性资产的敞口增加。该机构警告称，比特币目前约占USDT储备的5.6%，已超过超额抵押缓冲区，如果比特币价格下跌，可能导致抵押不足的风险。标普还指出，Tether在储备构成、托管方及交易对手信息披露方面存在持续透明度缺口，缺乏监管保障和资产隔离。Tether储备中高风险资产比例已从去年17%升至24%。尽管Tether声称其储备充足且未失去锚定，标普此次下调评级反映了对其应对市场冲击及维持美元锚定能力的担忧。标普表示，若Tether降低高风险资产敞口并提升储备及合作方透明度，评级有望上调。
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