The Federal Reserve’s September rate increase and new stablecoin oversight proposals are exposing a sharp divide across crypto markets. Stablecoin issuers can collect more income on short-term reserve assets, while Bitcoin-linked borrowers face higher financing costs — a split that challenges the idea that all crypto businesses move together when Treasury yields shift.
In the banking system, a hypothetical $100 stablecoin purchase may leave total deposits unchanged, but it changes the quality of bank funding. The Bank for International Settlements’ 2026 analysis shows household deposits can return as large institutional issuer deposits that are less predictable and potentially more expensive. The Federal Reserve has similarly described the conversion from scattered retail balances into large institutional accounts. Under Liquidity Coverage Ratio math, the same bank with $120 million in liquid assets and $100 million in estimated outflows has a 120% ratio; if outflows rise to $110 million, the ratio falls to about 109% even without any actual withdrawal.
Reserve composition is central. When an issuer buys existing Treasury bills from a nonbank investor, the seller’s bank balance rises while the issuer’s falls, so system-wide deposits do not disappear. If the bill is bought from a bank itself, the transaction can reduce both sides of the banking system’s balance sheet. BIS General Manager Pablo Hernández de Cos emphasized reserve composition in an August speech, and the Fed’s September 24 proposals would set reserve and risk-management rules for payment stablecoin issuers under its supervision, including a process for banks seeking to issue via a subsidiary.
At the same time, the Fed’s September 16 decision to raise its target range by 25 basis points to 3.75%–4% directly affects short-term reserve yields. Circle’s second-quarter filing shows reserve income supplied 95.2% of revenue in the three months ended June 30, 2026, with returns tracking SOFR. A hypothetical issuer with $10 billion in reserves earning 4% annually would generate $400 million before costs; at 3%, that income falls to $300 million and requires roughly $13.33 billion in reserves to recover the lost revenue. Token holders may not receive that income unless the product explicitly grants it.
Bitcoin holders and borrowers experience the other side. Bitcoin itself pays no contractual interest, so higher real yields raise the opportunity cost of holding it. The related market pressure has been visible, with surging US real yields cited as a factor quietly forcing Bitcoin under $84,000. A company raising $100 million in fresh floating-rate debt would pay an additional $2 million per year if its borrowing rate rose by two percentage points. The effect depends on whether debt is fixed or floating, when refinancing occurs, and whether convertible features dilute equity holders.
Onchain lending adds further complexity. Aave’s documentation notes that supplier returns depend on borrowing utilization and protocol parameters, not just Treasury yields. A 7% onchain yield versus a 4% short-term government investment can look attractive, but the extra three percentage points must be weighed against liquidity, technical, counterparty, and contractual risks. The net result is that one bond-market move can finance stablecoin reserve income while making leveraged Bitcoin strategies and rate-sensitive crypto businesses harder to sustain.
