Tether says it has completed a Big Four audit of the finances behind its USDT stablecoin, the token it reports as circulating at roughly $180 billion. The company framed the engagement as its first full audit and a new quality standard for the digital asset economy. The claim comes directly from Tether, which announced it had signed a Big Four accounting firm to carry out the review, according to the company’s own statement. A “Big Four audit” refers to a full financial audit conducted by one of the four largest global accounting firms, a step beyond the quarterly attestations Tether has previously published. For related coverage, see Upbit to List Conflux (CFX) in KRW, BTC, and USDT Markets.