Key Highlights

  • Coinbase Global (NASDAQ:COIN) rose about 4.5% to 5% to near USD 178.86 on Wednesday, October 21, 2026 after the OCC finalised rules under the GENIUS Act stablecoin law.
  • The final rules keep the statutory ban on issuers paying interest to stablecoin holders but leave rewards offered by third parties, such as exchanges, to case-by-case review.
  • That leaves Coinbase's USDC rewards programme in a grey zone rather than prohibited, while Circle Internet Group (NYSE:CRCL), the USDC issuer, rose about 6% in the same session.
  • Coinbase shares were still down about 21% for 2026 before the rally, against a gain of about 14% for Circle over the same period, a gap of about 35 percentage points on simple arithmetic.

Interest Banned, Rewards Left Open

Coinbase Global (NASDAQ:COIN), the largest US crypto exchange, gained about 4.5% to 5% to near USD 178.86 on Wednesday, October 21, 2026. The Office of the Comptroller of the Currency (OCC) finalised its rules for stablecoin issuers under the GENIUS Act. The law already bars issuers from paying interest or yield to holders, and the final rules keep that ban. Rewards paid by third parties, such as exchanges offering returns to customers who hold USDC, were not banned outright. Instead the OCC will weigh them against the statutory ban case by case. The law takes effect in January 2027. Treasury Secretary Scott Bessent called the act "a watershed moment in American finance." Coinbase was down about 21% for 2026 before the move.

How USDC Rewards Are Funded

Coinbase Global (NASDAQ:COIN) can pay rewards on USDC because it shares in the reserve income Circle earns on the Treasury bills and cash behind the token. Under their distribution agreement, a portion of that interest flows to Coinbase, which passes part to customers as rewards. Average USDC in circulation reached USD 76.5 billion in the second quarter of 2026, with a reserve return rate of 3.5%. The distinction matters: an issuer paying interest makes a stablecoin look like a deposit or a security, while an exchange reward is framed as a platform incentive. Banks argue that rewards could still pull deposits from the banking system. Case-by-case review preserves the revenue stream for now, but without a firm safe harbour.

Risks and What to Watch

The first risk for Coinbase Global (NASDAQ:COIN) is an adverse ruling on rewards, which could weaken the appeal of holding USDC on the platform and reduce balances that earn reserve income. The second is rates: lower short-term yields would shrink the pool funding rewards, although the Fed raised rates on Wednesday, September 16, 2026. The third is crypto trading activity, which drives transaction revenue and tends to follow prices; bitcoin slipped toward USD 82,000 on Thursday, October 22, 2026. Anti-money laundering rules will also arrive through a separate rulemaking. Investors should watch the Fed decision on Wednesday, October 28, 2026, third-quarter results, which last year came on Thursday, October 30, 2025, and the January 2027 effective date.

Where Things Stand

The answer is that holders can still earn some return on USDC through platforms such as Coinbase, but not from the issuer, and the rewards channel now depends on case-by-case review. That kept a valuable revenue line intact for the exchange, which helped the shares rise. The next catalysts are the Fed decision on October 28, third-quarter results and the January 2027 effective date. Reward rates are not guaranteed and can change, and this is not investment advice.