City Protocol Launches On-Chain Tokenized Equity Portfolio (OTP): On-Chain Redefinition of ETF

Following institutions like Ondo, Binance, Bitget, and Coinbase rolling out tokenized stocks, individual equities have become a standard onchain asset: each backed by real shares held in regulated custody, tradable 24/7, and verifiable onchain. Yet what investors typically need is not a single stock, but a fully structured portfolio—a layer that has long been absent onchain. City Protocol fills this exact gap: the components, weights, and rules of the portfolio are fully transparent, and buying in is as simple as purchasing a single stock. With a single payment, each stock in the portfolio is deployed into an account controlled exclusively by the holder, open 24/7 without requiring a local broker account; when rules are triggered, the portfolio rebalances accordingly, and exiting is as straightforward as entering. This is a structured products market trading entire portfolios as single instruments, with the first three portfolios launching today.

September 15, 2026

Structured products marketplace City Protocol launches Onchain Token Portfolios (OTP) today. Previously, City Protocol was primarily known for its curator vaults. Through OTPs, holders can purchase a basket of tokenized stocks as a single portfolio and directly hold each underlying stock.

1. $23 Trillion in Assets, Exchanges Open Only One-Fifth of the Year

ETFs and index funds manage approximately $23 trillion in assets globally, representing the largest product category in finance. Rather than holding individual tickers separately, investors prefer to buy a ready-made portfolio.

Yet the underlying mechanics supporting these products are showing their age. U.S. equities trade for roughly 1,638 hours annually, less than one-fifth of the total time; products relying on them can only operate intermittently, pricing once per day.

There is also a distance between investors and the stocks themselves. Subscriptions and redemptions are only open to Authorized Participants (APs), participation depending on jurisdiction and brokerage. Between the investor and the publicly listed company lie brokers, funds, custodians, and transfer agents. Each additional intermediary forces capital to pause another stop on someone else’s balance sheet.

Figure 1. The distance between investors and stocks. Via the fund route, four layers of intermediaries sit between the investor and the public company; in an OTP, stocks are held directly in the investor’s own account.

2. Assets Are Already Onchain, But the Portfolio Layer Hasn’t Kept Pace

As of 2026, tokenized U.S. equities trade 24/7 on BNB Chain and Base, each backed by real shares in regulated custody and verifiable via block explorers; Treasuries, credit, and trading strategies are already housed in priceable vaults.

The only missing piece is the portfolio layer of encapsulation. The sole packaging format previously available onchain was the vault, whose logic is “aggregation”: accepting deposits, issuing shares, pricing those shares, and rationing exits. That logic fits strategies operating under a single ledger but fails for portfolios—where assets ought to be self-custodied by the holder.

City Protocol bridges this exact gap: running a portfolio construction methodology within the holder’s own account.

Figure 2. Two layers. The asset layer filled first: tokenized stocks and priceable vaults are in place; the portfolio layer above them remains empty until the arrival of OTPs.

3. Curator Vaults vs. OTPs: Two Architectures on the Same Layer

Curator vaults aggregate deposits under a named manager, operating within audited, code-enforced permissions: depositors hold a receipt token, the vault prices by share, returns derive from the strategy, and exits occur via redemption—either at any time or during open windows.

An OTP is a second architecture on the same layer, functioning in precisely the opposite way: no pool exists; instead, underlying assets are purchased directly into the holder’s account and rebalanced according to the publicly published construction methodology. The holder owns the actual stocks, priced individually by the market, with returns deriving from the underlying assets, and exiting simply means selling assets already owned.

Both architectures serve distinct product types. Strategies unified under a single ledger—such as lending or market-neutral trading—fit vaults; portfolios built from named assets fit OTPs. An OTP can hold a vault position as an underlying asset, whereas a vault cannot hold a portfolio.

Figure 3. Itemized comparison between curator vaults and OTPs across six dimensions.

4. How OTPs Operate

An OTP is a portfolio: defined by a publicly released, versioned construction methodology, and stored within each holder’s personal onchain account. The methodology specifies underlying assets, initial weights, and rebalancing rules, published prior to launch; execution strictly adheres to the disclosed version.

This yields four core characteristics.

4.1 One Transaction for Full Portfolio Entry

The holder signs once, and stablecoins are converted into all underlying assets at the published weights, with stocks flowing directly into a smart account owned by the holder. For the Magnificent Seven Index OTP, a single signature buys seven tokenized stocks, each comprising one-seventh of the allocation.

Figure 4. Single-signature entry. Stablecoins convert to underlying assets at published weights, flowing entirely into the holder’s account; in the Magnificent Seven case, seven tokenized stocks, each one-seventh.

4.2 Direct Custody of Every Underlying Asset

Every holder maintains a separate account, so stocks are never commingled; positions are simply these balances themselves, priced by the market and visible on block explorers. Each balance corresponds to a single tokenized stock, which the holder may sell individually, transfer, or retain.

Figure 5. Aggregated products offer holders shares inside a container and a valuation calculated by the operator; OTPs provide holders with underlying asset balances at their own address and a value anyone can independently verify.

4.3 Rebalancing Only Upon Preset Rule Triggers

Portfolio allocations adjust only when preset rules in the construction methodology are triggered, with all rules tied to public information. For Guru OTPs, triggers include new regulatory filings or disclosed transactions, with adjustments mirroring the disclosures exactly; for Index OTPs, triggers are changes to index rules; for Thematic OTPs, they involve securities being added or removed per criteria.

Between rebalances, weights float naturally with market movements. The product sets no target weights or tolerance bands: in years where a component stock performs strongly, its portfolio weight naturally increases. By design, rebalance frequency is inherently low.

Figure 6. Cases triggering vs. not triggering rebalancing. A regulatory filing, disclosed transaction, or index rule change prompts adjustment; price swings, weight threshold breaches, or calendar dates do not.

4.4 Direct Exits: Sell the Entire Basket or Individual Legs

Holders can sell the entire basket back into stablecoins in one transaction, sell only one component while retaining others, or transfer a single leg to another address. The product imposes no lockups or settlement windows—because there is no pool requiring rationed liquidity.

Even if City Protocol ceases operations, every holder retains full ownership of all underlying assets in their own account.

Figure 7. Three exit pathways, none requiring wait times or counterparty approval.

5. Anatomy of an OTP

These capabilities are enabled by three components: custody secures the stocks, the rebalancing mechanism adjusts allocations, and the Issuance & Operations layer runs the product.

5.1 Custody

Upon login, the system generates an embedded wallet via Privy—a genuine onchain private key controlled solely by the holder, requiring neither seed phrases nor browser extensions. When purchasing a portfolio, the system provisions a smart account owned by that wallet, storing all underlying assets within it.

The private key is immediately split into two shards and encrypted separately: one decryptable by Privy, the other released only upon holder login, meaning the complete key exists solely for the instant of signing. Neither Privy nor City Protocol holds the full private key.

Figure 8. Custody architecture. The holder’s embedded wallet owns the smart account, which holds the stocks, while the corresponding private key is stored in two shards synthesized only at signing. City Protocol does not appear anywhere in this chain of title.

5.2 Rebalancing

Once triggered, the Issuance & Operations layer will publish the new allocation alongside the corresponding regulatory filing or rule change on the product page before any execution takes place, allowing holders to exit beforehand if desired.

In the next phase, the Rebalancing Executor will carry out allocations within each authorized account. Operating as a policy-constrained signer, it is permitted only to swap and approve underlying assets, with no other privileges; holders may remove it at any time, leaving all underlying assets intact in the account. The Basket Execution Router settles these trades as atomic batches, with each leg price-verified and capped for slippage; every rebalance logs to the Rebalances tab.

Currently launched Index OTPs maintain fixed constituents pending index rule changes, so no rebalancing has occurred yet.

Figure 9. From trigger to trail. Rebalancing is announced first, then executed across accounts under swap-and-approve-only policies, finally logged permanently. Executors and routers belong to the next phase.

5.3 Issuance & Operations Layer

The Issuance & Operations layer is identical to the one powering City Protocol’s curator vaults. For OTPs, this layer validates the construction methodology pre-launch, deploys the product, announces ahead of each rebalance, and publishes outcomes on the product page. It handles product operations while assets remain wholly owned by holders.

Figure 10. Three tiers. The construction methodology is published once; the Issuance & Operations layer validates and announces each rebalance, with results landing directly in each holder’s personal smart account.

6. Live Today on BNB Chain and Base

Three products currently run on this pipeline. The Magnificent Seven Index OTP on BNB Chain holds Alphabet, Amazon, Apple, Meta, Microsoft, Nvidia, and Tesla, each at one-seventh; underlying assets are bStocks tokenized equities, backed 1:1 by custodied shares, accompanied by public proof-of-reserves.

On Base, the Fantastic Four Index OTP holds Alphabet, Apple, Meta, and Nvidia at one-quarter each; the Elon Musk Index OTP holds Tesla and SpaceX at one-half each. All three are Index OTPs, accessible exclusively to qualified participants outside the United States.

Since 2023, U.S. market gains have been largely driven by these seven companies, which most global investors have never directly owned. Index OTPs enable holders to fully own all seven within self-controlled accounts.

Figure 11. The three live Index OTPs, their underlying assets, and host chains.

7. One Pipeline, Three Product Types

A single pipeline defines three product categories. Index OTPs are live; Guru OTPs track disclosed holdings of prominent managers, rebalancing solely upon new regulatory filings or disclosed transactions; Thematic OTPs hold all securities meeting publicly defined criteria. The latter two will launch in the next phase.

This pipeline accepts any underlying asset with an onchain price, and methodologies are chain-agnostic: the same rules function identically regardless of the underlying asset’s trading environment.

Figure 12. Index, Guru, and Thematic OTPs share identical accounts, permission models, and execution pipelines; the only distinction lies in rebalance triggers.

8. Next Phase: Launching a Portfolio Without First Forming a Fund

Identical shifts will extend to issuers. Historically, deploying a portfolio required establishing a legal vehicle, staffing a custodian, administrator, and market maker, and securing exchange listing—the portfolio itself was the lightest lift.

In the next phase, City Protocol will open this pathway to third-party issuers: issuers publish a construction methodology, the layer validates and executes it, never touching participant assets—launching an index requires no prerequisite fund formation. This capability is not yet open; all currently live OTPs are self-issued by City Protocol.

Figure 13. Fund route vs. announcement route: months-long cycles and five steps map to a single methodology and one validation gate.

The upcoming phase introduces automated rebalancing, Guru and Thematic products, and opens issuance to publishers who merely declare a methodology without forming a legal fund.

About City Protocol

City Protocol is an onchain infrastructure provider for structured products, offering tokenization and issuance layers. Its flagship platform, Venzo, now delivers curated strategy vaults and Onchain Token Portfolios (OTPs)—baskets of assets allocated per public rules, granting holders exposure to tokenized equities.

Venzo website: http://app.venzofinance.com

City Protocol website: cityprotocol.co

X: https://x.com/cityprotocolHQ