Web3 Weekly: September 15–21, 2026 — The CLARITY Act fails in the Senate as the SEC exempts tokenized-stock venues
A September 15–21 briefing on the CLARITY Act's Senate defeat, the SEC's five-year exemption for tokenized-stock trading venues, the CFTC's rulemaking filing, three stablecoin and credit funding rounds, and Optimism, Ethereum, Solana, Circle Arc and ZetaChain protocol milestones.
In the seven days from September 15 to 21, 2026, the path to US crypto rules shifted from the Senate floor to the agencies. The Senate failed to advance the CLARITY Act on September 15 1, and within three days the Securities and Exchange Commission (SEC) had issued a five-year conditional exemption letting qualifying venues trade tokenized National Market System (NMS) stock onchain 2, while the Commodity Futures Trading Commission (CFTC) sent its own crypto rulemaking to the White House for review 3. Capital kept flowing into stablecoin and credit rails rather than early-stage venture: Velocity extended its Series A by $10 million 4, a Brooklyn private-credit platform announced a seed round that had already closed in March 5, and Singapore's dtcpay completed a $25 million Series A with SBI Group joining 6. Infrastructure supplied the week's other milestones: Circle opened its Arc Layer 1 mainnet 7, Optimism approved the dispute-system upgrade its Superchain needs before interoperability can go live 8, and Solana took its third step down the slot-time ladder to 250 milliseconds 9.
Weekly event matrix
| Organization / Project | Category | Amount / Scope | Disclosed date | Substantive impact |
|---|---|---|---|---|
| U.S. Senate | Legislation | Cloture vote, 50–49 | Sep 15, 2026 | CLARITY Act blocked; no comprehensive federal market-structure law this session 1 |
| U.S. SEC | Exemptive order | Five-year conditional relief | Sep 17, 2026 | Tokenized Securities Venues may trade tokenized NMS stock without registering as exchanges, subject to conditions 2 |
| U.S. CFTC | Rulemaking | Two proposals at pre-rule stage | Filed Sep 17, 2026 | "Regulation Crypto Asset Transactions and Regulation Crypto Asset Markets" entered White House review 10 |
| U.S. CFTC | No-action letter | Registration relief | Sep 17, 2026 | Passive software providers, including some wallet interfaces, need not register as introducing brokers, on conditions 11 |
| U.S. House Financial Services Committee | Legislation | Bill advanced | Sep 16, 2026 | American Reserve Modernization Act moves toward a codified strategic bitcoin reserve 12 |
| Binance / ECB (reported) | EU licensing | Application blocked in Greece | Sep 18, 2026 | Reported ECB intervention kept the exchange outside the MiCA passport 13 |
| European Central Bank | Market infrastructure | Platform go-live | Sep 21, 2026 | Pontes lets eligible institutions settle tokenized wholesale trades in central-bank money 14 |
| Optimism | Layer 2 upgrade | Governance approval | Sep 16, 2026 | Upgrade 20 moves fault proofs to Super Root dispute games; mainnet targeted Sep 24 8 |
| Circle | Layer 1 launch | Arc public mainnet | Sep 16, 2026 | 100+ applications at launch; 10 billion ARC tokens minted, no public token launch committed 7 |
| ZetaChain | Protocol wind-down | Governance vote, 99.4% | Sep 20, 2026 | Layer 1 to be retired; ZETA to become a Solana SPL token one-for-one 15 |
| Ethereum | Protocol rehearsal | Devnet-11 test | Sep 16, 2026 | 2,302 block-level access list tests passed; Sepolia target remains Oct 6 16 |
| Solana | Protocol upgrade | Slot time 300ms → 250ms | Sep 18, 2026 | Confirmation latency falls; final 200 ms stage unscheduled 9 |
| Velocity | Funding | $10M Series A extension ($48M total) | Sep 15, 2026 | Visa Ventures, Circle Ventures, Ripple and Haun Ventures back stablecoin treasury rails 4 |
| Tare | Funding | $13.25M seed, closed March | Sep 16, 2026 | Blockchain Capital-led round funds onchain loan servicing on Avalanche 5 |
| dtcpay | Funding | $25M Series A completed | Sep 18, 2026 | SBI Group joins as strategic investor through two vehicles 6 |
Web3 financing and capital deployment
Three rounds were disclosed in the window. They do not belong in one bucket, because only one of them is fresh money raised this week.
Velocity — $10 million extension, $48 million total Series A (September 15). The stablecoin payments and treasury platform added $10 million from Visa Ventures, Circle Ventures, Ripple and Haun Ventures 4. This is a priced equity extension of an existing round and the only genuinely new capital disclosed in the window. Its investor list is the signal worth reading: two card and stablecoin issuers and a payments network buying into the treasury layer that sits between corporate cash and stablecoin settlement.
Tare — $13.25 million seed, announced September 16, closed March 2026. Blockchain Capital led, with Janus Henderson, Strobe Ventures, the Venture Dept, Neoclassic Capital and the Avalanche Foundation, plus individual backers including Aave's Stani Kulechov and Tether cofounder Phil Potter 5. The company builds loan-record and servicing software on Avalanche and has not disclosed a valuation. Read the date carefully: the round closed six months before it was announced, so it is not evidence of September pricing or September demand.
dtcpay — $25 million Series A completed (September 18). SBI Group joined through SBI Ventures Asset Pte Ltd and the SBI-NTU-Kyobo Digital Innovation Fund, completing a round whose initial tranche was led by Vertex Ventures Southeast Asia & India and announced in April 6. The company holds a Singapore payments licence, runs stablecoin point-of-sale terminals and has a Visa stablecoin-to-fiat card partnership. This is a round total, not new September money.
What falls outside the equity bucket this week: nothing in the window was a fund close, a locked token sale or a public-company treasury placement. Two items readers may see filed under "funding" elsewhere belong elsewhere — Circle's genesis mint of 10 billion ARC tokens is a technical supply event with no committed public sale 7, and the reported Polymarket financing remains unconfirmed (see below).
Regulatory actions and market structure
The CLARITY Act fails in the Senate
The Senate voted 50–49 on September 15 to advance the CLARITY Act, ten votes short of the 60 needed. Four Republicans — Jerry Moran, Susan Collins, Josh Hawley and Thom Tillis — joined every Democrat in opposing it 1. Tillis switched from yes to no, a procedural move that preserves his ability to bring the measure back. Bitcoin fell more than 5% as the vote failed and crypto equities fell as much as 10%.
What changed for a compliance team: nothing binding. No federal market-structure statute exists, which means the rules you operate under in the United States are still the ones the SEC and CFTC write under their existing authority — and those can be rewritten or challenged. Reuters reported that industry executives and analysts expect the agency route to be more exposed to political shifts and litigation than a statute would be 1. Coinbase CEO Brian Armstrong said publicly after the vote that he expects the two agencies to begin rulemaking "in earnest" 1.
SEC issues a five-year "Innovation Exemption" for tokenized stock venues
On September 17 the SEC issued an order granting temporary, conditional relief from the definition of "exchange" in the Securities Exchange Act to Tokenized Securities Venues (TSVs) trading tokenized NMS stock through permissioned automated market maker liquidity pools 2. The order also grants a temporary conditional exemption from the "dealer" definition to liquidity providers that supply tokenized NMS stock from proprietary capital 2. Both exemptions expire five years after publication, and the order is open for comment 17.
The conditions are the operative part for anyone planning around this:
- The number of symbols and the volume traded on a TSV are capped.
- A TSV must verify that the tokenized stock carries the same rights and privileges as the underlying NMS stock of an equivalent class.
- Before listing stock tokenized by an unaffiliated third party, the venue must give written notice to the issuer and an opportunity to object.
- Smart contracts must be auditable, public, and deployed on a public, permissionless distributed ledger.
- Trading must stop in the tokenized instrument whenever the underlying stock stops trading on its primary listing exchange.
- The venue must publish notice of its operations and of trading by its affiliates.
Chairman Paul Atkins framed the relief as a bridge toward durable rulemaking, and Trading and Markets Director Jamie Selway said the division will work with parties seeking to operate a TSV 2. This is narrower than it reads at first glance: it is exchange registration relief for one kind of venue trading one kind of asset, under caps and conditions, for five years 18. Separately, the SEC's press-release surface carried no crypto enforcement action in the window; the releases dated September 14 and 16 concerned inline XBRL filing relief and a proposal to rescind the shareholder-proposal rule, neither of which is a crypto measure 19.
The CFTC moves its rulemaking and, separately, its wallet-software position
The CFTC filed two crypto proposals with the White House Office of Management and Budget for regulatory review, under the title "Regulation Crypto Asset Transactions and Regulation Crypto Asset Markets." Reginfo.gov lists them against RIN 3038-AF80 with a received date of September 17 and a stage of "prerule" 10. No text is public; the agency has not said which assets the proposals cover or how far it believes its authority extends 3. The sequence from here is review, a commission vote, a public comment period, and a further vote before anything binds — a pre-rule filing is a timetable entry, not a regime.
The same day, the CFTC's Market Participants Division issued a no-action position covering providers of passive software, extending to all such providers relief previously granted in Staff Letter 26-09 11. Subject to conditions, the division will not recommend enforcement for failure to register as an introducing broker or associated person, where the provider's software lets users trade with registered futures commission merchants, introducing brokers and designated contract markets 11. Reported coverage adds that the relief covers interfaces including crypto wallets and comes with risk-disclosure and recordkeeping conditions, and that providers may not hold customer assets or control order routing 3. The relief lasts until the agency adopts rules on software-developer registration 3.
A House committee advances a codified bitcoin reserve
On September 16 the House Financial Services Committee advanced the American Reserve Modernization Act, which would direct the Treasury Department to maintain a "secure Bitcoin storage facility" and includes language for acquiring more bitcoin over five years through budget-neutral strategies, plus a stockpile for other digital assets 12. Representative Bill Foster opposed the measure on volatility grounds. This is a committee vote, not law; the bill's path to enactment is unchanged by it.
Europe: a reported veto, a new settlement platform, and quiet MiCA channels
The Wall Street Journal reported that European Central Bank President Christine Lagarde personally intervened to keep Binance from obtaining a MiCA licence in Greece, prompting a senior Greek regulator to tell the exchange the decision would be delayed until ESMA takes over licensing decisions under a proposed reform that has not been adopted 1320. Binance withdrew its Greek application in June. The report attributes the concern to dollar-stablecoin expansion and the digital euro project. Both the ECB and Binance declined to confirm the account as reported; the ECB noted it has no institutional role in authorizing crypto-asset service providers, which remains with national competent authorities 13. The WSJ also reported that ESMA privately advised national regulators to reject Binance's applications over past compliance issues 13. Treat this as reporting about how a decision was reached, not as a change in the licensing rule; MiCA still grants approval country by country, with one licence passporting across the bloc.
On September 21 the ECB launched Pontes, a wholesale platform that connects distributed-ledger market infrastructure to the Eurosystem's TARGET Services so eligible institutions can settle the cash leg of tokenized bond, fund and other wholesale trades in central-bank money 14. Access is limited to eligible financial institutions and market infrastructure providers. The retail digital euro is a separate project, with a one-year pilot slated for the second half of 2027 and possible issuance in 2029 14. Pontes matters to builders because it gives European institutions a central-bank-money settlement option alongside stablecoins and tokenized commercial-bank deposits.
On the ESMA news surface, the most recent publication remained its September 10 risk-monitoring report; nothing dated September 11–21 concerned MiCA technical standards, passporting or crypto-asset service provider supervision 21. That finding is scoped to that one page and the window; it is not a statement about national regulators.
Layer 2 networks and scaling
Optimism approves Upgrade 20. Governance voting closed on September 16, moving OP Sepolia, Ink Sepolia, Soneium Minato and Unichain Sepolia onto Super Root dispute games with a contract upgrade targeted for September 17, and mainnet execution scheduled for September 24 if the testnets complete a healthy seven-day soak 822. What actually changes: fault proofs move from anchoring a claim to an L2 block number to using a timestamp, which is the common time reference a future multi-chain dispute system needs. Permissioned chains move to game type 5 and permissionless fault-proof deployments to game type 9 8.
Operator impact is concentrated rather than universal.
op-challenger and op-dispute-mon need Super Root support before the L1 contract cutover, and op-proposer must move to the new RPC and game type when the upgraded contracts execute. Applications proving withdrawals through viem/op-stack need version 2.51.0 or later and must pass the initiating transaction's L2 timestamp. Ordinary users need do nothing, and previously submitted withdrawal proofs remain valid 8. Cross-chain interoperability itself remains a later step: each chain keeps its own dispute infrastructure for now.No new Layer 2 mainnet or public testnet launch occurred in the window. The Optimism upgrade is a change to a live network's proof system, not a launch, and it is counted as such here.
Major protocol upgrades and infrastructure
Circle opens the Arc mainnet
Circle's Arc Layer 1 opened to the public on September 16, with an Aave V4 lending market, Morpho and Uniswap available from day one and more than 100 applications at launch 7. Gas is paid in USDC, finality is sub-second, and the chain is EVM-compatible. The named founding validators include BlackRock, DTCC, ICE, Mastercard and Visa among eleven institutions joining in phases 7. Circle completed a genesis mint of 10 billion ARC tokens but said that is a technical milestone rather than a commitment to a public token launch, and it is exploring a move from proof of authority to proof of stake in 2027. Circle and DTCC plan to enable tokenization of DTC-custodied assets on Arc from the second half of 2027 7. Arc is a Layer 1, not a rollup, and belongs in the infrastructure count rather than the Layer 2 one.
ZetaChain votes to retire its own Layer 1
ZETA holders passed Proposal 68 on September 20 with 99.4% support and 58% participation, approving the shutdown of ZetaChain's Layer 1 and a move to Solana 1523. The team is redirecting effort to Anuma, its private AI application, and argues a Cosmos SDK chain's patch-coordination burden is no longer worth carrying 15. ZETA is to become a native Solana SPL token one-for-one, keeping its ticker, total supply and vesting schedules, excluding ZETA on Ethereum and BNB Chain. No shutdown block height or date has been set: a second proposal will fix the snapshot height, the shutdown block and the claiming process, and the team says it will not put that to a vote until exchanges confirm swap arrangements 15. Holders have a decision window, not a deadline yet.
Ethereum's Glamsterdam clears its capacity rehearsal
Nethermind, one of the execution clients that run Ethereum, completed all 2,302 performance tests for Glamsterdam's block-level access lists, processing 570.7 billion gas in three minutes and fifteen seconds — about 2.9 billion gas per second. That benchmark measures the client's execution software, not the speed of the network 16. Block-level access lists tell nodes which accounts and stored data a block will use before processing begins, letting them fetch data and check unrelated transactions in parallel instead of in sequence 16.
The test raised the block gas limit from 60 million to 200 million about an hour after the environment went live, and extended the time available to spread block data across the network from about two to nine seconds 16. Two caveats matter: the 200 million limit is a test setting, not a commitment for mainnet, and Devnet-11 was designed as a controlled rehearsal without deliberate attacks 16. Developers are targeting October 6 for Glamsterdam on the Sepolia public testnet, a date that still requires formal confirmation 16. Glamsterdam also moves the builder-to-validator handoff and the accompanying payments inside Ethereum's own rules, reducing dependence on external relay services 16. The upgrade itself remains scheduled for the Ethereum roadmap; Sepolia is a test network, not a Layer 2 24.
Solana cuts slot time to 250 milliseconds
SIMD-0525 reduces Solana's target slot time from 400 ms to 200 ms in four feature-gated steps: 350 ms, 300 ms, 250 ms, 200 ms 25. Anza, the client team, reported the 250 ms step pending on mainnet-beta with activation at the epoch 1037 boundary around 05:01 UTC on Friday, September 18; feature gates under this proposal take effect one epoch after they activate 925.
Three operational consequences are worth extracting from the specification rather than the announcement. Per-slot work limits fall in proportion to the shorter slot so the wall-clock rate stays roughly constant, and
slots_per_year rises by the inverse ratio so inflation is unchanged in wall-clock terms — this is a latency change, not a capacity change 25. Because epochs stay fixed at 432,000 slots, each stage also shortens epochs in wall-clock time, so validator reward cycles arrive faster. For Alpenglow validators, each stage scales the Validator Admission Ticket down to hold admission cost near 0.8 SOL per day: 1.2 SOL at 300 ms, 1.0 SOL at 250 ms, 0.8 SOL at 200 ms 25. The final 200 ms stage has no activation date yet 9.A dated technical report also placed the Agave 4.3 client on mainnet on September 18 carrying Alpenglow consensus code in an inert state, with activation to follow through a feature gate 26, and a second report describing the consensus switch's feature activation as targeted to begin September 28 27. Both are single-source items for now; the client release notes are the place to confirm them.
Editorial view: the rules moved from Congress to the agencies
Take the week's four US regulatory items together 121011. A statute failed, and in the same three days an exemptive order took effect immediately, a no-action position issued immediately, and a rulemaking entered review. The immediate ones are narrow and conditioned; the broad one is a pre-rule filing that needs two votes and a comment period before it binds anything. This is the author's reading of those four documents, not a statement by either agency. The practical consequence for a compliance team is that the operative ruleset in the United States stays agency-made for now — faster to change than a statute, and more exposed to challenge. Treat exemptions with expiry dates and no-action letters as permission with a shelf life, and read the conditions before the headline.
Action checklist by role
Founders and product leads
- If you are building anything that touches tokenized equities, read the TSV conditions before designing: symbol and volume caps, issuer notice before listing third-party-tokenized stock, auditable public smart contracts, trading halts synchronized with the primary listing venue, and public disclosure of venue and affiliate activity 2.
- Wallet and interface teams that surface derivatives markets to users should check eligibility under the CFTC passive-software position, and note the stated limits: no custody of customer assets, no buy or sell signals, no control of order routing 311.
- Teams weighing a chain of their own now have a case study on both sides in the same week: Arc launched with named institutional validators and USDC gas 7, while ZetaChain voted to retire its chain and migrate to Solana on patch-maintenance grounds 15.
Investors and deal teams
- Normalize before you compare: this week's disclosed "funding" spans $10 million of fresh priced equity (Velocity), a $25 million round total completed over two tranches (dtcpay), and a $13.25 million seed that closed in March (Tare) 456.
- Read the strategic-investor lists rather than the amounts: card networks, a stablecoin issuer and a payments network funding a treasury platform, and a Japanese financial group funding Singapore stablecoin payments, both point at settlement rails 46.
- The reported Polymarket financing from early September remains pending; a Wall Street Journal report on September 20 described a $10 million stolen-card fraud attempt and compliance concerns at the company during a period of rapid growth, which is a new risk factor for that process rather than a closed deal 2829.
Compliance and legal
- Re-read your EU licensing assumptions: the reported ECB intervention in Binance's Greek application shows influence on a process that MiCA assigns to national competent authorities, even though the licensing rule itself has not changed 13.
- Nothing in the window imposed a new binding obligation on EU crypto-asset service providers; the ESMA publication surface carried no MiCA item dated after September 10 21. Check national regulators directly for authorisation and passporting changes.
- If you rely on US agency positions, note their fragility: an expired five-year exemption, a no-action letter that lapses when rules arrive, and a rulemaking that is still at pre-rule stage are three different risk profiles 21011.
Operators, validators and RPC providers
- Optimism node runners:
op-challenger,op-dispute-monandop-proposerneed updates before the September 24 mainnet window; withdrawal-proving integrations needviem/op-stack2.51.0 or later 8. - Solana validators: the 250 ms stage lowers per-slot work limits rather than increasing throughput, shortens wall-clock epoch length, and scales the Alpenglow admission ticket toward 0.8 SOL per day 25.
- Testnet operators planning for Glamsterdam should treat October 6 as unconfirmed and wait for client release tags 16.
Forward watchlist
- September 24, 2026: Optimism Upgrade 20 mainnet execution, conditional on a clean seven-day testnet soak 8.
- September 28, 2026 (target reported): Solana Alpenglow consensus activation through a feature gate, following the Agave 4.3 release 27.
- October 6, 2026 (unconfirmed): Glamsterdam on the Sepolia testnet; Devnet-11 remains the gate 16.
- Undated: the SEC order's Federal Register publication and comment window; the CFTC rulemaking's return from OMB review; ZetaChain's second migration proposal and shutdown block height; the reported Polymarket financing; the next Solana slot-time feature gate at 200 ms 910172328.
References
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- 19SEC.gov | Press Releases
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- 21ESMA News | European Securities and Markets Authority
esma.europa.eu
- 22Upgrade 20: Super Root Dispute Games | Optimism Governance
gov.optimism.io
- 23Proposal 68 | ZetaChain Governance
hub.zetachain.com
- 24Ethereum roadmap: Glamsterdam | ethereum.org
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