Stablecoin Cap Hits $323.3B as USDS Surges, USDC Sheds $950M

The stablecoin sector reached a new all-time high of $323.343 billion in total market capitalization over the past seven days, with $1.542 billion in net inflows. The simple read is that stablecoin demand is rising, which typically signals fresh capital waiting to deploy into crypto assets. The better market read is that the composition of those inflows reveals a competitive shift, not a uniform expansion.

Tether's USDT remains the dominant force at $189.7 billion, a 58.67% market share, after adding just $68.2 million since May 9. That 0.04% weekly gain is essentially flat. The real action is elsewhere.

The $323.3B Milestone and the $950M USDC Outflow

Circle's USDC moved in the opposite direction, shedding 1.22% of its market cap – about $950 million – to land at $77.068 billion. That is a 1.98% decline since April 16. A $950 million outflow from the second-largest stablecoin in a single week is not noise. It suggests holders are rotating into other stablecoins or out of dollar-pegged exposure entirely.

Sky's USDS absorbed a large portion of that flow. The third-largest stablecoin expanded 11.50%, drawing in roughly $906 million in fresh capital. Its market cap now stands at $8.791 billion, edging toward the $10 billion threshold. Sky's older stablecoin DAI ranks fourth at $4.613 billion, trimming $46 million over the same period – a modest decline that reinforces the shift from DAI to USDS within the Sky ecosystem.

Key insight: The $1.5B weekly inflow masks a rotation from USDC to USDS, not a uniform demand increase. Traders should watch whether USDS breaks $10B – that would confirm the shift is structural, not a one-week anomaly.

USDS Absorbs $906M, Nears $10B Threshold

The divergence between USDS and USDC is the most actionable signal in this week's data. USDS is the native stablecoin of the Sky protocol, formerly MakerDAO's rebranded ecosystem. Its 11.5% weekly gain and $906 million inflow suggest that yield-bearing or DeFi-integrated stablecoins are gaining preference over plain-vanilla USDC.

USD1 from World Liberty Financial also moved higher, gaining 1.97% with roughly $87 million in inflows, lifting its market cap to $4.52 billion. That is a smaller positive signal for newer entrants.

What this means for traders: If USDC continues to bleed while USDS and USD1 absorb the flow, the stablecoin liquidity map is redrawing. USDC has long been the preferred collateral on centralized exchanges and in DeFi. A sustained decline could alter borrowing rates, slippage profiles, and arbitrage opportunities across pairs.

The USDS $10B Level as a Technical Trigger

A break above $10 billion for USDS would mark a psychological milestone. It would also confirm that capital is rotating out of USDC into Sky's ecosystem at a structural pace. That shift would affect liquidity on decentralized exchanges that use USDS as a base pair. Traders should monitor Sky's lending and savings protocol activity for confirmation.

Smaller Stablecoins: BUIDL, USDG, and the 597,568% Anomaly

Several smaller stablecoins posted outsized percentage moves, though their absolute market caps remain small.

• USDe from Ethena climbed 6.77%.
• PYUSD from PayPal advanced 1.32%.
• BUIDL from BlackRock recorded an 8.01% increase.
• USDG from Global Dollar climbed 9.63%.
• USYC from Circle posted a modest 0.30% decline.
• USDPT from Western Union recorded the week's sharpest increase, climbing 597,568%.

The USDPT number is eye-catching misleading. The newly launched stablecoin still holds a market capitalization of just $1.5 million. A 597,568% gain from a near-zero base is not a signal of organic demand. It reflects the first week of distribution after launch.

BUIDL and USDG are more relevant. BlackRock's BUIDL is a tokenized money-market fund, not a traditional stablecoin, its 8% weekly growth shows institutional appetite for on-chain yield products. USDG's 9.63% gain suggests that Global Dollar's compliance-first approach is gaining traction.

What the Rotation Means for Liquidity and DeFi

Three concrete points for the week ahead:

1. USDS at $10B is the next technical level. If it breaks through, expect more capital to rotate out of USDC and into Sky's ecosystem. That would affect liquidity on decentralized exchanges that use USDS as a base pair.

2. USDC's $950M weekly outflow needs confirmation. One week does not make a trend, if next week shows another $500M+ outflow, it becomes a structural shift. Watch Circle's reserve reports and any changes in exchange balances.

3. Stablecoin inflows as a proxy for crypto demand are weaker than they appear. The $1.5B weekly inflow is real, $906M of it went to USDS, which is largely used within Sky's DeFi ecosystem. That capital may not flow into Bitcoin or Ethereum directly. It could stay inside Sky's lending and savings protocols.

For traders building watchlists, the stablecoin sector is no longer a monolithic indicator. The divergence between USDC and USDS is the most actionable signal this week. A sustained rotation would reshape borrowing costs, arbitrage spreads, and liquidity depth across multiple DeFi venues. The next weekly data print will determine whether this is a one-off rebalancing or the start of a structural shift.

For broader context on how stablecoin flows relate to crypto market cycles, see our crypto market analysis. For individual asset profiles, check Bitcoin (BTC) and Ethereum (ETH).