sSPY, issued by Stablestocks Lab Limited, is a tokenized stock that gives onchain exposure to SPDR S&P 500 ETF Trust, a U.S.-listed exchange-traded fund, with each token backed 1:1 by one underlying share held in custody with licensed brokers. [S1][S2]

sSPY tracks the live market price of SPDR S&P 500 ETF Trust (sSPY), and if the underlying issues a dividend or distribution and eligibility requirements are met, those economic rights pass through to the tokenholder, though voting rights remain with custodian holders. [S1][S2] Tokenholders may stake into StableVault to receive yield-bearing stStocks combining dividends with DeFi yields. [S3] A Service Fee of 0.1% of the transaction amount applies, alongside upstream broker and trading fees. [S4]

Stablestocks Lab Limited, brand StableStock, is incorporated in the British Virgin Islands and operates from Singapore. [S2][S5] It does not hold financial-services licenses and disclaims being a regulated entity, relying on broker-dealer partners holding an AFSL, a Hong Kong SFC Type 1 license, and U.S. MSB registration. [S5][S2][S6] An sToken is the tokenized representation of a real share; tokens are unregistered under the U.S. Securities Act and offered only to Qualified Investors through affiliated entities. [S5][S1] U.S. persons are barred and KYC and AML verification applies for leverage and IPO access. [S5][S4] Tokenholders may redeem and burn tokens at any time to retrieve the underlying share. [S1][S2]

sTokens are issued natively onchain on Bsc through a liquidity partnership with Native. [S1][S7] Tokens are minted when brokerage-held shares are deposited 1:1 and burned on redemption, with mint, burn, buy, and sell records recorded permanently onchain. [S1][S8] Stablecoin settlement in USDT and USDC funds purchases of real securities, and reserve coverage is published per asset and verified by weekly assurance reports. [S9][S8]

<Sources
  retrievedAt="2026-06-18"
  items={[
    { id: "S1", url: "https://stablestock.gitbook.io/ss/concepts/stokens" },
    { id: "S2", url: "https://stablestock.gitbook.io/ss/llms-full.txt" },
    { id: "S3", url: "https://stablestock.gitbook.io/ss/concepts/stablevault.md" },
    { id: "S4", url: "https://stablestock.gitbook.io/ss/concepts/spot/fee.md" },
    { id: "S5", url: "https://stablestock.gitbook.io/ss/legal/terms_of_use.md" },
    { id: "S6", url: "https://stablestock.gitbook.io/ss/introduction/trust-and-security.md" },
    { id: "S7", url: "https://stablestock.gitbook.io/ss/concepts/stokens.md" },
    { id: "S8", url: "https://stablestock.gitbook.io/ss/concepts/transparency" },
    { id: "S9", url: "https://stablestock.gitbook.io/ss/solution/our-model.md" },
  ]}
/>


# Asset transfer volume methodology

## 1. Overview

Asset transfer volume is defined as the total value of assets transferred onchain. Since transaction fees are paid by users for each transfer, a correlation is typically observed between this metric and the customer demand that exists to use an asset for transacting purposes. Daily transfer volumes are aggregated across all supported blockchains, normalized by decimal precision, and converted into USD. To ensure an accurate representation of economic activity, transactions involving non-circulating treasury or premint addresses are subtracted where applicable.

## 2. Data sources

- **EVM chain events**: ERC-20 token transfers, covering EVM-compatible chains (Ethereum, Arbitrum, Base, Polygon, Optimism, Tron, Starknet, zkSync Era, and others)
- **Solana instructions**: SPL token transfers, mints, and burns
- **Aptos events**: Token withdraw events
- **Near events**: Token transfer events
- **Polkadot Asset Hub events**: `Transferred` events from the `assets` pallet
- **Cardano UTXO transactions**: Token deposits, withdrawals, and mint/burn events
- **Stellar operations**: Classic token withdrawals and Soroban SEP-41 token transfers
- **Sui transactions**: Token withdrawals and `TreasuryCap` supply changes
- **Algorand transactions**: Asset transfer transactions
- **Injective events**: Token transfer, mint, and burn events
- **Stacks transactions**: Token transfer events
- **Asset metadata**: Token contract addresses and decimal precision
- **External data**: End-of-day price feeds and fiat exchange rates

## 3. Step-by-step calculation

### Component A: Raw transfer volume extraction

- **Purpose**: Extract raw token transfer quantities from onchain events and transactions
- **Logic**: On EVM-compatible chains, token transfer quantities are extracted from ERC-20 `Transfer` events. On Solana, quantities are extracted from SPL token transfers, mints, and burns. On Aptos, Near, Algorand, Injective, and Stacks, transfer volumes are parsed from native token transfer and withdrawal events. On Polkadot Asset Hub, volumes are extracted from `Transferred` events emitted by the `assets` pallet. On Cardano, UTXO withdrawals and mint events are aggregated to capture all token movements. On Stellar, classic token withdrawals and Soroban SEP-41 transfer, mint, and burn events are parsed. On Sui, token withdrawals are combined with mint events derived from `TreasuryCap` supply changes.
- **Key fields**: `timestamp` (the day of the transfer) `token_address` (the contract or asset identifier) `amount` (the raw transfer quantity)

### Component B: Premint and preburn correction

- **Purpose**: Exclude non-circulating token movements to isolate genuine economic transfer volume
- **Logic**: For supported chains, raw transfer volumes are corrected by subtracting premints and preburns. Premints are defined as tokens minted directly into designated project treasury or premint addresses, while preburns are represented by tokens burned directly from these non-circulating addresses. On EVM-compatible chains, Solana, Injective, Stacks, and Stellar Soroban, these flows are identified by filtering transfers where the sender or recipient matches a known treasury address. On Algorand, transfers between asset configuration addresses and treasury addresses are subtracted. On Cardano, deposits to and withdrawals from treasury addresses during mint or burn transactions are netted out.
- **Key fields**: `amount` (the corrected transfer quantity) `token_address` (the contract or asset identifier) `timestamp` (the day of the transfer)

### Component C: Decimal normalization and zero-filling

- **Purpose**: Normalize token quantities to human-readable units and ensure continuous daily time series
- **Logic**: Raw token quantities are normalized by the decimal precision retrieved from the asset metadata. For days with no recorded transfer activity, the time series is filled with zero values to maintain a continuous daily record for each asset.
- **Key fields**: `amount` (the normalized transfer quantity) `decimals` (the decimal precision of the token)

### Component D: USD conversion and final aggregation

- **Purpose**: Convert normalized transfer volumes to USD and aggregate across all chains
- **Logic**: Normalized daily transfer volumes are multiplied by the end-of-day price feeds sourced from market data providers. For assets pegged to fiat currencies other than USD, daily exchange rates are applied using Chainlink FX price feeds to determine the USD-equivalent value. The final daily asset transfer volume is calculated by summing the USD-denominated transfer volumes across all active chains for each asset.
- **Key fields**: `price_usd` (the end-of-day market price of the asset in USD) `amount_usd` (the final transfer volume in USD)

*This methodology was automatically generated by Token Terminal's methodology analyzer.*

Asset transfer volume

Tokenized stocks

StableStock earns revenue from transaction fees on sStock issuance and redemption via its StableBroker product, and from the spread between deposit/withdrawal flows. Distribution is direct-to-retail (StableBroker app) and B2B via wallet/exchange integrations on BNB Chain.

StableStock issues sStock tokens — ERC-20 tokens on BNB Chain backed 1:1 by the underlying U.S. equity or ETF held at a licensed custodian. The product catalog spans 500+ tokenized stocks and ETFs (e.g. sAAPL, sNVDA, sTSLA, sQQQ) including newly-IPO'd names like sCRCL (Circle) and sBLSH (Bullish) and leveraged/inverse exposures. All sStocks are deployed as BeaconProxy contracts from a single upgradeable factory.

StableStock is an onchain stock asset platform that lets users buy and trade U.S. stocks and ETFs using stablecoins. StableStock is the issuer of sStock tokens — tokenized representations of equities — and is backed by YZi Labs (formerly Binance Labs) among others.

website

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documentation

Real-world asset (RWA) issuers

StableStock

StableStock SPDR S&P 500 ETF Trust (sSPY) is a token tracking the underlying shares, backed by dedicated collateral with HabitTrade as broker.

Each token tracks one underlying share, entitles holders to dividends, and carries no voting rights.

Residents of the United States and Hong Kong cannot mint or redeem with StableStock.

sSPY has been issued on BNB Chain as an ERC-20 token since August 2025.

StableStock SPDR S&P 500 ETF TrustsSPY