Coinbase Is a Rates Play in Custody's Clothing

Coinbase's revenue-share agreement with Circle, the issuer of USDC, gives Coinbase roughly half of the interest income generated by the reserves backing USDC outstanding. USDC outstanding was approximately $60 billion as of early 2026, up from $24 billion in early 2023.

At current short rates, the reserves generate approximately $2.8 billion of annualised interest. Coinbase's share is in the $1.3 to $1.4 billion range. That is the highest-margin revenue inside the company because there is no incremental cost per dollar of USDC outstanding.

The rate sensitivity matters. Every 100 basis points of Fed funds compression removes roughly $400 to $500 million of annualised revenue from this line. That is the rates-business exposure.

Two dynamics are not fully reflected in consensus.

The USDC share agreement is structural, not a one-off. As long as USDC outstanding grows and rates stay above 2%, the revenue grows. The base case for USDC circulation assumes 15 to 20% annual growth, which would push Coinbase's share of reserve interest to roughly $1.7 billion by 2027 even at flat rates.

Custody economics are understated. Institutional custody revenue has been growing roughly 50% year on year as more financial institutions adopt crypto exposure. The gross margin on custody is 85%+ and the revenue is recurring.

Historically, when a transactional business quietly develops a recurring revenue stream of meaningful size, the multiple re-rates toward the recurring business's comparable. SaaS custody comps trade at 8 to 12x revenue. Coinbase's consolidated multiple is 5x. The gap closes as investors reframe.

Coinbase's competitive moat is its regulatory positioning. It is the only publicly listed, US-regulated pure-play crypto exchange of scale. The ETF custody mandates following the Bitcoin ETF approvals in January 2024 consolidated institutional custody into roughly three providers, with Coinbase holding majority share.

Against Kraken, Gemini, and the offshore exchanges, Coinbase's licence stack and audit posture create a durable moat for institutional flow. Retail flow is more contested, but the higher-margin revenue is institutional.