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S&P Global downgraded Tether to “Weak” on Wednesday, citing a balance sheet that defies traditional risk management. The math is stark: Tether’s exposure to Bitcoin now exceeds its equity cushion.

With $180B in assets and zero deposit insurance, Tether is running the boldest liquidity experiment in finance. Here is why the U.S. Treasury might be forced to save a company it can’t even regulate.

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What happened

On November 26, 2025, S&P Global Ratings downgraded Tether (USDT) from “Constrained” to “Weak” (4 on a 5-point scale). The primary trigger was a shift in balance sheet composition: Tether’s holdings of Bitcoin now account for 5.6%of tokens in circulation, while its equity buffer (excess reserves) sits at just 3.9% ($6.8B). [see the report]

The math is simple: Tether’s exposure to volatile assets now exceeds its capacity to absorb a shock without dipping into customer funds.

  • S&P’s view: 100% reserve coverage isn’t enough for a stablecoin issuer holding volatile assets without a lender of last resort. A 70% drop in BTC would render USDT technically undercollateralized.

  • Tether’s view: CEO Paolo Ardoino dismissed the rating, citing $10B in annual profits and a massive portfolio of U.S. Treasuries ($135B) and gold. He framed the Bitcoin allocation as a strategic hedge against fiat debasement, not a liability.