Stablecoin weekly: Big-3 supply falls $428.7M as Ethereum absorbs $141.8M USDT (2026)

The latest seven-day snapshot is more negative in aggregate than the previous one, but the largest asset-level move is not a broad exit. USDT gained $141.8M on Ethereum while losing $179.0M on Tron and $99.9M on Solana. The Big-3 total still fell $428.7M, so the week reads as a contraction with a partial rail rotation rather than new market-wide buying power.

Snapshot cutoff: August 19, 2026, 08:00 (UTC-05:00). The DeFiLlama snapshot was read at about 08:07 local time; its current and circulatingPrevWeek fields are compared below. BTC and ETH prices were refreshed at about 08:05–08:06 local time. Rounded figures may not reconcile exactly.

Bottom line

Asset	Current supply	Previous-week supply	7-day change	Change
USDT	$182.927B	$183.018B	-$90.8M	-0.05%
USDC	$71.905B	$72.229B	-$324.1M	-0.45%
DAI	$4.770B	$4.784B	-$13.8M	-0.29%
USDT + USDC + DAI	$259.602B	$260.031B	-$428.7M	-0.16%

DeFiLlama's asset-level snapshot supplies the current and prior-week values. 1

The combined decline is 2.28 times the previous issue's $187.7M decrease. USDC accounts for $324.1M, or about three quarters, of this week's contraction; USDT's $90.8M decline is smaller because Ethereum's gain offset larger losses on two other rails. DAI remains a small drag rather than a separate liquidity event.

The practical read is a more defensive aggregate with a narrower, Ethereum-led USDT rebound. That distinction matters: a chain balance can rise because tokens were routed, reissued, or moved between operational wallets without creating additional dollars available to buy risk assets.

The chain map: Ethereum takes USDT while Solana gives back USDC

The following tables use the same fields for each asset. Other chains is the residual of the full DeFiLlama chain list, not an estimate of bridge activity. A positive chain delta is an endpoint-balance increase; it does not identify the path taken.

USDT

Chain	Current supply	7-day change
Ethereum	$74.166B	+$141.8M
Tron	$90.468B	-$179.0M
Arbitrum	$827.1M	+$6.6M
Solana	$2.858B	-$99.9M
Avalanche	$382.3M	-$0.9K
BSC	$9.177B	+$4.4K
Hyperliquid L1	$95.6M	-$12.7M
Polygon	$834.2M	+$12.0M
Aptos	$976.3M	-$1.0K
Plasma	$659.8M	+$25.7M
Other chains	$2.482B	+$14.7M

USDT's two largest losses, on Tron and Solana, total $278.9M. Ethereum's $141.8M gain absorbs only about half of that amount, leaving the asset down $90.8M overall. The move therefore reverses part of last week's Tron-heavy pattern without restoring aggregate supply.

USDC

Chain	Current supply	7-day change
Ethereum	$46.308B	+$31.5M
Tron	$27.9M	+$0.0K
Arbitrum	$2.232B	-$24.1M
Solana	$6.762B	-$199.7M
Avalanche	$404.3M	-$43.6M
Base	$4.184B	+$13.3M
BSC	$1.581B	+$79.7K
Hyperliquid L1	$6.018B	-$22.1M
Polygon	$1.616B	+$9.3M
Aptos	$221.0M	-$4.0M
Stellar	$337.1M	-$63.4M
Plasma	$0.0K	+$0.0K
Other chains	$2.214B	-$21.4M

Solana's $199.7M USDC decline is the clearest single-chain loss in the Big-3 table. Ethereum's $31.5M gain and Base's $13.3M gain are too small to offset it, while Stellar loses another $63.4M. USDC is therefore contracting across several rails, not simply swapping one chain for another.

DAI

Chain	Current supply	7-day change
Ethereum	$4.116B	+$6.5M
Tron	$0.0K	+$0.0K
Arbitrum	$18.8M	-$18.5K
Solana	$510.4K	+$0.0K
Avalanche	$10.7M	-$15.7K
Base	$0.0K	+$0.0K
BSC	$31.1M	+$0.0K
Hyperliquid L1	$0.0K	+$0.0K
Polygon	$518.7M	-$20.3M
Aptos	$0.0K	+$0.0K
Stellar	$0.0K	+$0.0K
Plasma	$0.0K	+$0.0K
Other chains	$74.5M	+$13.9K

DAI's $13.8M decline is concentrated in Polygon, with a small Ethereum increase. It does not change the Big-3 reading. 1

A chain endpoint balance is not a bridge-flow ledger. Without the source and destination pair, the tables cannot say whether USDT moved from Tron to Ethereum through a bridge, whether an issuer rebalanced inventory, or whether users traded inside an application.

Issuer and large-wallet events: two USDC mints, but no proof of fresh demand

The public alert set verified the following events inside the seven-day window. The timestamps below are converted to UTC-05:00.

Asset	Amount and direction	Chain	Local time	Wallet category	Source
USDC	250.000M minted at USDC Treasury 2	Solana	Aug 18, 07:12	Issuer treasury	Whale Alert
USDC	250.000M minted at USDC Treasury 3	Solana	Aug 19, 06:12	Issuer treasury	Whale Alert
USDT	130.000M transferred from Tether Treasury to Bitfinex 4	Ethereum	Aug 17, 04:13	Issuer-to-exchange operation	Whale Alert
USDC	192.661M transferred from Unknown Whale 1 to Aave 5	Ethereum	Aug 18, 19:10	Unknown wallet to protocol	Whale Alert
USDT	190.000M transferred from an unknown wallet to Binance 6	Solana	Aug 18, 20:14	Unknown wallet to exchange	Whale Alert

The two USDC mints total $500M, yet Solana's endpoint balance fell $199.7M over the same comparison window. That is the important reconciliation: a treasury mint is inventory evidence, not a count of end-user buying power. The $130M Tether Treasury transfer is also an operational transfer, not a mint. The Aave and Binance transfers show possible deployment destinations, but their unknown sending wallets do not establish whether traders bought spot assets, supplied collateral, or simply moved funds.

No complete issuer-level burn ledger, and no comparable Maker/Sky DAI mint-or-burn event, was verified from the public event sources for this window. Whale Alert is a selected alert feed rather than a complete supply-accounting system, so the table should not be read as a census of every mint, burn, or large wallet.

Market cross-check

Asset / indicator	Snapshot	7-day or latest change
BTC	$64,723.70	+1.73% over 7 days; +0.71% over 24 hours
ETH	$1,931.97	+2.23% over 7 days; +1.70% over 24 hours
Crypto Fear & Greed	46, Fear	Previous reading: 41, Fear
Combined USDT + USDC exchange balance	Data temporarily unavailable	No verified seven-day public series

CoinPaprika supplied the BTC and ETH prices and percentage changes. 7 8 The Fear & Greed API's latest reading was timestamped August 18 at 19:00 local time. 9

CryptoQuant's August 18 report gives longer-run context: it describes centralized-exchange stablecoin liquidity falling from roughly $80B at its late-2025 peak to around $64B in the report's current view. That is not a seven-day combined USDT-plus-USDC balance, so it is not substituted for this week's requested exchange-balance change. 10

BTC and ETH both rose over seven days while the Big-3 supply fell. The price rebound therefore arrived without broad stablecoin expansion in this snapshot. Fear improved from 41 to 46 but remained in the Fear classification. Together, those facts support a cautious reading: risk prices have recovered at the margin, but the stablecoin base has not yet confirmed a market-wide liquidity expansion.

What the snapshot can—and cannot—say

Are stablecoins growing in aggregate? No. USDT, USDC, and DAI fell from $260.031B to $259.602B, a $428.7M decline. The contraction is larger than last week's $187.7M decline, even though USDT's Ethereum balance increased.
Is capital concentrating on a rail? Partly. Ethereum USDT rose $141.8M while Tron and Solana USDT fell a combined $278.9M. USDC's Solana balance also fell $199.7M, so the week is not a clean rotation into one replacement chain.
Is that capital available to buy risk assets? Not established. The USDC Treasury mints, the Tether-to-Bitfinex transfer, and the unknown-wallet transfers identify operational or deployment events, not end-user demand. The price rebound and improved Fear & Greed reading do not fill that missing link.

Pair-by-pair bridge flows for USDT, USDC, and DAI were not available: the DeFiLlama Bridges endpoint returned a paid-plan prompt instead of a usable seven-day table. A comparable public series for combined USDT plus USDC balances held on major exchanges was also not verified. 11

The next confirmation to watch is whether Ethereum's USDT gain holds while Tron and Solana stop losing balances. If the three changes stabilize together, this week's move may become a durable rail redistribution. If Ethereum gives back its gain while the aggregate keeps shrinking, the stronger signal will be liquidity contraction rather than venue rotation.

Method note: Supply figures use DeFiLlama's asset and chain snapshots. Issuer and wallet events come from Whale Alert's public event records and are not treated as proof of end-user demand. Market figures use the linked public APIs. All displayed times are in UTC-05:00.

This report is informational and does not constitute investment advice.