Stablecoins in 2026 are larger, better capitalized and more tightly supervised than a year ago. The two dominant issuers reported combined tokens outstanding of about $258 billion at mid-year: Tether had roughly $184.6 billion of USDT in circulation against $187.75 billion of assets at June 30, and Circle Internet Group (CRCL) reported $73.3 billion of USDC, up 19% from a year earlier [1][3]. The federal stablecoin law enacted on July 18, 2025 is now moving from statute to rulebook, with proposed regulations from the Treasury Department and the Office of the Comptroller of the Currency (OCC) published between February and April [4][5]. This note covers market size, reserve composition and the economic effects of the new framework, with data as of August 6, 2026.
Stablecoins in 2026: market size and who issues them
Tether's attestation for the quarter ended June 30, 2026, released July 31, reported total assets of $187.75 billion against total liabilities of $183.64 billion, leaving excess reserves of $4.11 billion [1]. Tokens issued rose to about $184.6 billion during a quarter in which the wider crypto market lost value, and the company reported a net operating profit of $1.50 billion, most of it from U.S. Treasury and repo positions [1]. Excess reserves were down sharply from the record $8.23 billion reported at March 31, when total assets were $191.77 billion [2].
Circle's second-quarter results, released August 5, put USDC in circulation at $73.3 billion at quarter end, 19% higher than a year earlier, with average circulation up 25% [3]. Reserve income was $668 million, up 5%, and total revenue and reserve income reached $701 million, up 7% [3]. The gap between 25% growth in average circulation and 5% growth in reserve income reflects a 66 basis point decline in the reserve return rate as short-term yields fell [3]. Circle reported net income from continuing operations of $48 million and USDC on-chain transaction volume of $14.8 trillion for the quarter, up 151% [3].
| Issuer (as of June 30, 2026) | Tokens outstanding | Quarterly income | Other |
|---|---|---|---|
| Tether (USDT) | About $184.6 billion | $1.50 billion net operating profit | Excess reserves $4.11 billion; gold holdings above 146 tons |
| Circle (USDC) | $73.3 billion | $668 million reserve income | Reserve return rate down 66 bp year over year |
Sources: Tether Q2 2026 attestation release and Circle Q2 2026 results [1][3].
What backs the tokens: reserves in practice
Both issuers describe reserves that are concentrated in short-dated U.S. government instruments. Tether says the majority of its reserves are in U.S. government-backed instruments and that it reduced secured lending exposure by about $2.38 billion, or 15%, during the second quarter, while adding 14 tons of gold to bring holdings above 146 tons [1]. At the end of March the company reported direct and indirect U.S. Treasury exposure of about $141 billion [2]. Circle's reserve income of $668 million on average circulation of roughly $70 billion implies an annualized return near 3.8%, consistent with a portfolio of Treasury bills and overnight repo [3].
Why the reserve mix matters for the economy
Stablecoin issuers have become a structural buyer of short-term government debt. A combined $258 billion of tokens backed mostly by bills and repo is a meaningful share of the bill market, and issuer profits are simply the spread between the bill yield and the zero interest paid to token holders [1][3]. That spread is why the reserve return rate matters: Circle's 66 basis point decline in return rate cost it growth in income even as circulation rose [3]. Tether's $1.50 billion quarterly profit on about $184 billion of liabilities works out to an annualized return of roughly 3.3% on the tokens, again in line with bill yields [1]. Stablecoin economics are, in short, money market economics without a pass-through of interest to the holder.
How the 2025 stablecoin law changed the market
The law enacted on July 18, 2025 created the first federal licensing regime for payment stablecoin issuers, and 2026 has been the year of implementing rules. The OCC issued its proposed regulations in February, covering applications and registrations for permitted issuers, standards for reserve assets, and revisions to capital adequacy rules; the framework takes effect on the earlier of January 18, 2027 or 120 days after final regulations are issued [4]. In April the Treasury's Financial Crimes Enforcement Network and Office of Foreign Assets Control proposed a joint rule that treats permitted payment stablecoin issuers as financial institutions under the Bank Secrecy Act, requiring anti-money-laundering and sanctions compliance programs tailored to digital asset operations [5].
The economic effects so far are three:
- Consolidation toward compliant issuers. Growth in 2026 has accrued to the two largest issuers, both of which publish reserve reports and are positioning for licensing. Circle's 19% growth and Tether's continued issuance during a bear market show that regulatory clarity has supported demand rather than reduced it [1][3].
- Standardized reserves. Rules that specify permitted reserve assets push the whole sector toward bills, repo and insured deposits, which reduces run risk but also caps issuer returns at the risk-free rate [4].
- Compliance cost as a barrier. Bank Secrecy Act programs, capital requirements and licensing fees are fixed costs that favor scale. Smaller issuers face a choice between exiting, partnering or accepting lower margins [5].
The market-oriented case for the framework is that it converts an unregulated shadow deposit into a supervised, fully reserved payment instrument without creating a government guarantee, and it does so with rules light enough that private issuers continue to grow. The counterpoint is that fixed compliance costs entrench incumbents and that issuers, not token holders, capture the interest on reserves. Both points are visible in the 2026 data [1][3][4][5].
Stablecoins have become a $258 billion, Treasury-bill-backed payment layer whose issuers earn the bill yield and whose users hold dollars that pay nothing.
What to watch through year end
Three data points will show whether the framework is working. First, the final OCC and Treasury rules and their effective dates, which determine when unlicensed issuance becomes unlawful [4][5]. Second, the reserve return rate at Circle and the profit line at Tether, which move with short-term yields and reveal how sensitive issuer economics are to Federal Reserve policy [1][3]. Third, whether growth in tokens outstanding continues while bitcoin, which stood at $64,262 on August 6, remains well below its January levels; stablecoin growth in a weak crypto market suggests payment and settlement demand rather than trading demand [6]. Market data on the largest tokens is available on DataPorium's crypto market page.
Key takeaways
- USDT (about $184.6 billion) and USDC ($73.3 billion) together exceeded $258 billion outstanding at June 30, 2026 [1][3].
- Tether reported $187.75 billion of assets, $183.64 billion of liabilities and $4.11 billion of excess reserves, down from $8.23 billion at March 31 [1][2].
- Circle's reserve income rose 5% to $668 million while circulation grew 19%, because the reserve return rate fell 66 basis points [3].
- The July 2025 law is being implemented through OCC and Treasury proposed rules; the framework takes effect no later than January 18, 2027 [4][5].
- Issuers earn Treasury bill yields on reserves; token holders receive no interest, which is the core of the business model [1][3].
Frequently asked questions
How big is the stablecoin market in 2026?
The two largest issuers alone had about $258 billion outstanding at June 30, 2026: roughly $184.6 billion of USDT and $73.3 billion of USDC, according to Tether's attestation and Circle's quarterly results.
What backs USDT and USDC?
Mostly short-dated U.S. Treasury bills, overnight repo and cash. Tether reported $187.75 billion of assets against $183.64 billion of liabilities at June 30, 2026, with the majority in U.S. government-backed instruments plus more than 146 tons of gold. Circle's reserves are held in Treasuries, repo and bank deposits.
When does the 2025 stablecoin law take effect?
The OCC's proposed regulations state that the framework takes effect on the earlier of January 18, 2027 (18 months after enactment) or 120 days after final regulations are issued. Treasury and the OCC published proposed rules in February and April 2026.
How do stablecoin issuers make money?
They invest reserves in Treasury bills and repo and keep the interest. Tether earned $1.50 billion of net operating profit in the second quarter of 2026 and Circle earned $668 million of reserve income, while token holders receive no interest.
Sources & References
- [1] Tether: Q2 2026 attestation release, $1.5B net operating profit and $4.11B reserve buffer (July 31, 2026)
- [2] Tether: Q1 2026 attestation release, $1.04B profit and $8.23B reserve buffer (May 1, 2026)
- [3] Circle: Circle Reports Second Quarter 2026 Results (August 5, 2026)
- [4] OCC Bulletin 2026-3: GENIUS Act Regulations, Notice of Proposed Rulemaking (February 25, 2026)
- [5] U.S. Treasury: Treasury Proposes Rule to Implement the GENIUS Act's Requirements to Counter Illicit Finance (April 8, 2026)
- [6] DataPorium Crypto Market Data (BTC-USD daily prices)
