DeFi TVL September 2026 Week 3: Nostra & CLARITY Act

The DeFi TVL September 2026 week 3 snapshot closes with TVL at $92.22B, up 6.58% over seven days. Bitcoin gained 4.9%, Ethereum gained 3.6%, and the Fear & Greed Index held at 56 while remaining in Greed.

The week’s largest security event was Nostra’s Starknet oracle incident. The protocol said a manipulated NSTR price enabled one account to borrow about $3.5M in assets against NSTR collateral before lending, borrowing, withdrawals, and liquidations were paused.

Circle launched Arc mainnet with native USDC integration. The SEC issued temporary conditional relief for permissioned tokenized-stock liquidity pools, Morpho opened USDC borrowing against Coinbase tokenized stocks on Base, and the Senate rejected cloture on the CLARITY Act motion to proceed.

On the yield front, this edition highlights five live positions on Portals Explorer. The selection includes two tokenized-stock opportunities from the Portals and Base campaign, plus three large Ethereum stablecoin and vault positions.

Market Pulse

• Total Market Cap: $2.87T (+5.7% 24h)
• DeFi TVL: $92.22B (+6.58% 7d)
• BTC Price: $81,177 (+4.9% 7d)
• ETH Price: $2,632 (+3.6% 7d)
• Gas (ETH): 0.154 Gwei
• Sentiment: Greed (56)

The DeFi TVL September 2026 week 3 data shows a constructive market. Bitcoin and Ethereum both gained over seven days, while DeFi TVL increased faster than either asset.

Total crypto market cap was $2.87T, up 5.7% over the latest 24-hour period. Ethereum gas stood at 0.154 Gwei. These low costs support mainnet deposits, withdrawals, and portfolio rebalancing, especially for strategies that require several contract interactions.

Greed at 56 remains constructive and was unchanged from the previous week. The combination still calls for selectivity where yield depends on thin collateral, temporary incentives, tokenized-asset liquidity, complex strategy wrappers, or constrained withdrawal capacity.

Top Yields on Portals Explorer

This week, we highlight five live opportunities on Portals Explorer. The selection combines two Base vaults that generate yield on Coinbase Tokenized Stocks with three established Ethereum stablecoin and lending-vault positions.

1. NVDA SuperVault (Base)

The NVDA SuperVault on Base is offering a 17.18% APY with $405.19K in TVL. This Superform vault gives users onchain exposure to NVDAC, the Coinbase tokenized asset linked to NVIDIA shares.

The vault holds NVDAC as its reserve asset. Its current return consists of a 17.18% reward APY, compared with a 22.62% seven-day average, while one-day volume reached $78.81K.

View on Portals Explorer

2. Beefy CLM AAPLc-USDC Reward Pool (Base)

The Beefy CLM AAPLc-USDC Reward Pool on Base is offering a 38.67% APY with $302.86K in TVL. This receipt token represents a Beefy Cowcentrated Liquidity Manager position in Aerodrome’s AAPLc-USDC pool and is staked one-to-one for campaign incentives.

The position holds the AAPLc-USDC liquidity position as its reserve exposure. Its return combines a 17.47% base APY and a 21.20% reward APY, compared with a 44.85% seven-day average, while one-day volume reached $11.84K.

View on Portals Explorer

3. Syrup USDC (Ethereum)

Syrup USDC on Ethereum is offering a 5.05% APY with $1.01B in TVL. The position reports USDC as its reserve asset and provides variable yield through the Syrup vault.

The current APY was above its 4.96% seven-day average after a 0.10 percentage-point daily increase.

View on Portals Explorer

4. Ethena Staked USDe (Ethereum)

Ethena Staked USDe on Ethereum is offering a 4.68% APY with $1.33B in TVL. sUSDe represents a claim on USDe staked through Ethena’s StakedUSDe smart contract.

The vault reports USDe as its reserve asset. Ethena describes USDe as a synthetic stablecoin using liquid staked ETH, liquid stablecoins, and a delta-neutral derivatives strategy to capture funding-rate and basis income. The current APY was below its 4.99% seven-day average, while one-day volume reached $21.15M.

View on Portals Explorer

5. Morpho Gauntlet USDC Prime (Ethereum)

Morpho Gauntlet USDC Prime on Ethereum is offering a 4.07% APY with $102.34M in TVL. This Morpho Vault V2 accepts USDC and issues gtusdcp shares under Gauntlet’s Prime mandate.

The vault holds USDC as its reserve asset. Prime is Gauntlet’s most conservative risk tier, restricting allocations to blue-chip and highly liquid collateral markets. The current APY was below its 4.47% seven-day average, while one-day volume reached $15.43M.

View on Portals Explorer

Explore Tokenized Stocks on Base on Portals

The Portals and Base campaign brings Coinbase Tokenized Stocks and the DeFi opportunities they power into one interface.

Users can explore stock-linked assets and related yield positions, zap from assets across chains, and review the campaign terms. The campaign page advertises free zaps and entry into a $10K raffle.

Discover Base Tokenized Stocks on Portals

DeFi News

Nostra Pauses Starknet Money Market After $3.5M NSTR Oracle Manipulation

Nostra said a manipulated NSTR oracle price on 17 September enabled one account to borrow about $3.5M in ETH, STRK, USDC, USDT, WBTC, and DAIv1 against NSTR collateral.

The protocol paused lending, borrowing, withdrawals, and liquidations while it reconciles the impact and traces funds. Final losses and potential recovery were not known in Nostra’s statement.

Circle Launches Arc Mainnet With USDC-Native Fees

Circle announced Arc’s public mainnet launch on 16 September. Circle describes Arc as an open Layer 1 for financial markets and real-time money movement, with native USDC integration, sub-second finality, and more than 100 institutional and ecosystem builders participating or exploring the network.

Circle named Uniswap, Aave, and Morpho among the intended DeFi participants and said tokenized funds including Circle USYC and BlackRock BUIDL are intended for trading, lending, and collateral use. The main question now is whether its stated institutional integrations produce persistent liquidity rather than only announced support.

SEC Opens Conditional Tokenized-Stock Liquidity-Pool Pathway

The SEC issued temporary, conditional exemptive relief on 17 September for Tokenized Securities Venues that trade tokenized National Market System stocks through permissioned automated market makers and liquidity pools. The order also gives qualifying proprietary-capital liquidity providers conditional relief from the dealer definition.

The pathway is limited. Venues must apply symbol and volume limits, verify that tokens carry the same rights and privileges as the equivalent stock, use auditable public smart contracts on a public permissionless ledger, and halt token trading when the underlying stock is halted. The exemptions expire five years after publication and do not authorize unrestricted permissionless or synthetic-stock trading.

Morpho Opens USDC Borrowing Against Coinbase Tokenized Stocks on Base

Morpho opened Base markets where holders of AAPLc, GOOGLc, NVDAc, METAc, and SPCXc can pledge the Coinbase tokenized stocks and borrow USDC at variable or fixed rates. Steakhouse Financial curates the five markets, and each market uses a Chainlink price feed through Morpho’s Chainlink V2 oracle adapter.

It secured $104,401 of stock-token collateral, $54,652 borrowed, and $60,265 supplied across the five markets at its snapshot. The early markets are not available to U.S. persons or other restricted jurisdictions, and their current scale means users should treat the launch as an emerging lending primitive rather than evidence of deep, mature liquidity.

Senate Rejects Cloture on the CLARITY Act Motion to Proceed

The Senate rejected cloture on the motion to proceed to H.R. 3633, the Digital Asset Market CLARITY Act, on 15 September. The official Senate roll call recorded 49 yeas, 50 nays, and one senator not voting, short of the three-fifths threshold required to invoke cloture.

This is a substantive follow-up to Week 2’s coverage of the revised CLARITY Act text and its planned vote. The vote did not enact the bill; Congress.gov continues to list H.R. 3633 as passed by the House. For DeFi teams, the immediate result is continued uncertainty around the proposed statutory and rulemaking framework rather than a newly effective set of DeFi obligations or exemptions.

Chain Performance Analysis

Ethereum held $52.47B in DeFi TVL, equal to 56.9% of the cross-chain total, after a 7.48% weekly increase. Its scale continues to anchor lending, liquid staking, vault infrastructure, and stablecoin liquidity.

Solana remained the second-largest chain at $6.27B after gaining 9.01%. BSC increased 3.15% to $5.75B, while Base gained 6.04% to $5.86B. The Base move measures protocol TVL rather than the trading value or activity of Coinbase Tokenized Stocks.

Tron increased 1.86% to $5.56B. Bitcoin DeFi gained 5.44% to $4.39B. The broad gains point to a constructive liquidity week, but cross-chain TVL remains an aggregate measure rather than a direct indicator of position-level depth or withdrawal capacity.

Top DeFi Protocols

Lido remained the largest protocol family at $25.50B after a 3.39% weekly increase. Its liquid staking tokens allow users to retain onchain liquidity while earning network staking rewards.

Aave V3 ranked second at $17.93B, up 1.24%, while SSV Network held $13.74B after gaining 2.93%. Morpho Blue followed at $10.64B with a 10.26% increase.

Binance Staked ETH and WBTC held $9.73B and $9.44B, respectively. SparkLend recorded the strongest top-seven move, rising 15.20% to $5.59B.

Looking Ahead

Nostra’s Loss Assessment and Oracle Controls

Nostra’s recovery process, final loss assessment, and account of the manipulated oracle are the immediate milestones. The incident is also a reminder for lending protocols to review oracle design, collateral listings, market caps, borrow limits, and emergency procedures before a stressed price can turn into systemic debt.

Users and protocols should verify Nostra’s latest market and recovery status before treating affected collateral as dependable borrowing capacity. The incident gives lending teams a concrete reason to review price-source assumptions, collateral caps, and pause controls.

Tokenized-Stock Markets and CLARITY Remain Early Tests

The SEC’s conditional tokenized-stock pathway and Morpho’s Base lending markets create new routes for stock-linked onchain liquidity. The next test is whether compliant venues, reliable price feeds, collateral depth, and user demand develop beyond early pools and announced integrations.

The CLARITY Act’s failed cloture vote leaves the bill short of Senate passage. Agency actions and market-led products will continue to shape the near-term environment, while teams and users should monitor rulemaking, market access restrictions, collateral depth, and actual liquidity rather than assuming that a proposed framework has become law.

Read last week’s edition: DeFi TVL September 2026 Week 2: Liquid Network Exploit

About portals.fi : Portals is the DeFi Super App. A one-click gateway to the entire onchain economy. Powered by real-time data and seamless execution, Portals connects traders to over 20 million assets, thousands of protocols, and every major blockchain.

Disclaimer: The content of this newsletter is for informational purposes only. It is not investment advice. Please do your own research and consult with a qualified financial advisor before making any investment decisions. DeFi investments carry significant risks, and past performance does not guarantee future results. More details here.