Stablecoin Supply Shrinks to $299 Billion as October Wipes Out 2026 Gains

The dollar stablecoin market ended October smaller than it began the month, erasing the year’s modest gains and leaving total supply back below $300 billion. According to SonicWallet’s November 2026 update, which uses DefiLlama daily data checked on November 2, 2026, dollar-pegged stablecoins totalled $299.3 billion on October 31, down 2.4 percent during October and down 2.0 percent since the end of 2025. The decline is not a crash, and it is not a depegging event. It is something quieter and, for crypto liquidity, arguably more important: a month in which holders handed back more coins for redemption than new buyers minted.

That distinction is worth holding onto, because stablecoin supply is often misread as a price. Supply here means circulating supply, the coins in public hands, which for a dollar coin equals its dollar value at one dollar. It rises when someone deposits dollars with an issuer to mint new coins and falls when holders redeem coins for dollars, so a monthly change measures net money flowing into or out of stablecoins rather than a price move. October’s $7.39 billion fall therefore tells a story about flows, not about fear of a broken peg, and the details of those flows reveal a market consolidating around its two giants while smaller coins fight for share.

A $7.39 billion October decline in USDT USDC stablecoin supply

The arithmetic of October is straightforward, and SonicWallet lays it out step by step. DefiLlama’s daily readings put all dollar-pegged stablecoins at $306.67 billion on September 30, 2026, and at $299.28 billion on October 31, a fall of $7.39 billion, or 2.41 percent. The two largest coins accounted for almost all of it. Tether’s USDT fell $3.75 billion and Circle’s USDC fell $2.68 billion, and together those two declines represent about 87 percent of the month’s total drop. When the two coins that dominate the market both shrink at once, the aggregate figure moves with them, whatever smaller coins do.

The month-end snapshot shows USDT at $178.14 billion, down 3.1 percent in October, and USDC at $70.9 billion, down 4.5 percent, with peg readings of $0.9989 for USDT and $0.9998 for USDC. Those prices sit fractions of a cent from one dollar, far from any depegging alarm, and they confirm that October’s story was redemption, not a loss of confidence in backing. Holders were not dumping coins at a discount because they doubted reserves; they were redeeming them at par, or selling close to par, because they wanted dollars or other assets instead. October’s fall also needs context. Supply grew from $204.8 billion on December 31, 2024, to $305.5 billion a year later, a 49.2 percent rise, according to SonicWallet, then moved sideways. It set a record of $316.4 billion on May 20, 2026, slid to $298.8 billion by August 11, climbed back to $306.7 billion by September 30, then fell again, leaving it 5.4 percent below the May peak. The pattern is a range, not a steady decline, with supply oscillating between roughly $299 billion and $313 billion across monthly readings in 2026.

Concentration eases as smaller coins diverge

Beneath the headline total, the market’s composition shifted in ways that matter for competition and regulation. USDT and USDC still dominate, holding 84.2 percent of supply on October 31, but that share is down from 86.2 percent on December 31, 2025, and coins outside the nine largest grew from $16.0 billion to $19.5 billion over the same period. The giants shrank while the tail grew, a slow deconcentration running all year.

Pegs held firm through the October outflow

One of the most reassuring findings in the November update is that the pegs held. On DefiLlama’s daily prices, none of the nine largest dollar stablecoins closed a day more than 0.5 percent from one dollar between October 1 and November 1, 2026. October 29 was the softest day, when seven of the nine posted their lowest reading of the month, yet even then the widest gap, USD1’s low of $0.9976, was under half the 0.5 percent line that SonicWallet’s research uses to count a depeg day. USDT’s lowest daily price was $0.9984 on October 29, and USDC’s was $0.9991 the same day, gaps of 0.16 percent and 0.09 percent respectively.

October itself was a broad retreat rather than a rotation. Most of the largest coins shrank during the month, with USD1 down 14.3 percent and Global Dollar down 10.6 percent in the update’s 30-day table, while Ripple’s RLUSD was the exception among the top nine, rising 2.5 percent. That breadth points to a market-wide outflow rather than a shift from one issuer to another, consistent with a month in which crypto risk appetite cooled and holders moved money out of the stablecoin system altogether. By network, DefiLlama put 47 percent of all dollar stablecoins on Ethereum and 32 percent on Tron as of November 2, 2026, with Solana third at 5 percent, so fees and capacity on those two chains still largely determine the cost of moving stablecoins.

GENIUS Act stablecoin rules take shape ahead of January 2027

The regulatory backdrop to October’s numbers is the slow construction of the GENIUS Act rulebook. The statute itself is unchanged, but the agencies writing its rules have moved, and the first final rule arrived on October 21, 2026. The GENIUS Act was signed on July 18, 2025, as Public Law 119-27, and takes effect on January 18, 2027, with each regulator writing rules for the issuers it will supervise. Their progress varies, and the differences matter for issuers planning for the effective date.

The Office of the Comptroller of the Currency, covering nonbank federal issuers, national bank subsidiaries and foreign issuers, issued its final rule on October 21 and published it on October 23, effective January 18, 2027. The Federal Reserve, covering subsidiaries of state member banks, published two proposals on September 29, with comments due November 30. The Federal Deposit Insurance Corporation, covering subsidiaries of state nonmember banks, proposed standards in April, with comments closed June 9. The National Credit Union Administration published proposals on February 12 and May 18, with comment periods closed April 13 and July 17, and the Treasury, covering what platforms may offer and sell, has a proposal with comments closed October 19. Three details matter most to holders. First, the OCC dropped its proposed presumption that interest paid through affiliates or partners breaks the ban on paying holders yield; the final rule restates the statute and leaves such arrangements to case-by-case review, while Fed and FDIC proposals keep a presumption. Second, the OCC will take applications and waiver requests only after the Office of Management and Budget approves its forms, and an issuer needs a substantially complete application pending on January 18, 2027, to seek a waiver of up to 12 months. Third, from July 18, 2028, United States platforms may not offer or sell coins from issuers that are neither permitted nor approved foreign issuers.

What a smaller but still $299 billion supply means for liquidity

So what does a shrinking but still roughly $299 billion supply mean for crypto liquidity? It signals cooling, not crisis. Stablecoins are the settlement asset of crypto markets: traders park profits in them, post them as collateral, use them to buy other tokens, and move them across borders faster than bank wires. When supply grows, new money is usually entering crypto; when it shrinks, money is leaving, or at least pausing. October’s $7.39 billion outflow, concentrated in USDT and USDC, fits a month in which risk appetite faded, and it aligns with other signs of cooling, including heavy outflows from United States spot bitcoin exchange-traded funds around the same period.

Frequently asked questions

Why did stablecoin supply fall in October 2026?

DefiLlama’s figures show where the drop came from rather than why: USDT shrank by $3.75 billion and USDC by $2.68 billion, together about 87 percent of the $7.39 billion decline. Supply falls when holders redeem more coins than issuers mint, and the data does not show who redeemed or their reasons.

Is a stablecoin trading at $0.9989 depegged?

Not by the yardstick SonicWallet’s depeg study uses, which counts a day as off the peg only when the daily price is more than 0.5 percent from one dollar. At $0.9989 a coin is about 0.11 percent below its peg, a gap that usually closes as traders buy the discount and verified customers redeem at par.

What is the GENIUS Act timeline for stablecoins?

The GENIUS Act was signed on July 18, 2025, and takes effect on January 18, 2027. The OCC issued its final rule on October 21, 2026, published October 23, while Federal Reserve proposals published September 29 have comments due November 30, and from July 18, 2028, United States platforms may not offer coins from issuers that are neither permitted nor approved foreign issuers.

Does a smaller stablecoin supply mean crypto is in trouble?

Not by itself. A 2.4 percent monthly decline trims liquidity at the margin but leaves nearly $299 billion in circulation, far above levels of two years ago. The warning pattern is a sharp drop combined with a price stuck below one dollar, and October showed the opposite: orderly redemptions with pegs intact.

Are stablecoin reserves fully backing the coins?

The latest reports, from September 30, 2026, show Circle with $73.96 billion of reserves against 73.88 billion USDC in circulation, and Tether with $191.45 billion of assets against $183.50 billion of liabilities, an excess of $7.95 billion. Those are point-in-time checks that differ in asset mix, and they are not deposit insurance.

Source: SonicWallet / DefiLlama

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