What a tokenized real-world asset actually is

An asset, a register and a token

Three simple ideas carry the whole subject, so they come first.

Assets are anything of value that someone can own. A US Treasury bill is one: a short loan to the US government that pays back a fixed amount on a set date. So is a bar of gold in a vault, or a share in an investment fund.

A register is the official list of who owns what. When you own a fund share, no paper certificate sits in a drawer. Your ownership is a line in a list kept by a licensed firm, and that line is what a court would look at.

A transfer agent is the licensed firm that keeps this list for a fund. It also handles people buying in, cashing out and receiving payouts.

A token is an entry on a blockchain that sits at an address controlled by a wallet and can be sent to another address in seconds, at any hour. On its own, a token is only a number in a shared database. It becomes worth something when a party off the chain promises that the number means ownership of something.

Put the three together and you have the whole idea of tokenization: take the register of an existing asset and keep it on a blockchain, or connect it to one, so that ownership can move as a token.

The test that separates an RWA from a price bet

"Real-world asset" gets stuck on many things that are not one. A useful definition has to be something a product can fail, and the one this course uses fits in a sentence.

An RWA is a token whose value comes from an enforceable claim against an identified party that controls an asset existing off the chain. Each part of that sentence does work.

An enforceable claim is a right you can take to court against someone with a name. Exposure to a price is something else. Two positions can move with the same number on a screen while only one of them survives the other side walking away.

The definition breaks down into three questions, and a product must pass all three:

1. Is there an asset off the chain that produces the token's value?
2. Is there an identified party that owes the holder something?
3. Is there a defined way to hand the token back and receive the asset or cash?

BUIDL passes. So do PAXG, a token for gold held in trust by Paxos, and USDC, the dollar stablecoin from Circle. A perpetual futures contract on a tokenized share fails all three. It follows a share price and settles in stablecoins, but no share is bought, nobody owes the holder the share, and there is nothing to redeem. It is a bet on a price, and a very popular one: in the first quarter of 2026 perpetuals on tokenized stocks traded about fifty times the value of the tokenized stocks themselves, according to CoinGecko.

The issuer is the entity that sells the token and carries the obligation written in the legal documents. Redemption is the path for handing the token back to the issuer and getting paid. The issuer is often not the famous name on the product page. BlackRock manages the money in BUIDL, but the party that owes a holder anything is a fund company registered in the British Virgin Islands. Reading who the issuer is comes first in any analysis.

The asset stays put and the owner list moves

Tokenization does not put a Treasury bill on a blockchain. The bill stays exactly where it was, with a bank, under the same law as before. Only the list of owners changes form.

The custodian is the bank that holds the asset: a regulated firm that keeps assets for clients and may not treat them as its own. In BUIDL the custodian is BNY Mellon, which also acts as the fund's administrator. The transfer agent is Securitize, a firm registered with the US Securities and Exchange Commission (SEC), which keeps the shareholder list and issues the tokens. PwC audits the fund. All of these roles existed long before blockchains.

So an RWA has two halves joined by a border. Above the border, off the chain, sit the asset, the legal structure that holds it, the custodian and the register keeper. Below it, on the chain, sit the token, the investor's wallet and every transfer. Only two actions cross the border. Minting creates new tokens when an investor pays in, and redemption destroys tokens when an investor cashes out.

This border explains why an RWA token cannot be judged by its code alone. Every guarantee that matters to a holder lives above it, in contracts and in regulated firms. The chain adds speed, round-the-clock transfers and the chance to plug the token into other on-chain software. It does not add a single legal right the paperwork did not already give.

Register, mirror or IOU: three levels of a token

"The token represents the asset" can describe three different legal setups. They look identical on a normal day and very different on a bad one.

At level A the token is the register. The blockchain is the official list of owners, so the entry in your wallet is your title. Franklin Templeton says its FOBXX money-market fund, launched on the Stellar blockchain in April 2021, was the first US-registered fund to use a public blockchain as its official system of record.

At level B the token mirrors a register kept in a traditional system. The issuer keeps the two in sync. The mirror is convenient, but the original list is the law, and when the two disagree the original wins.

At level C the token is an IOU: a debt claim on the issuer, with no ownership of the assets underneath. Ondo Finance describes its USDY token this way. USDY holds Treasury bills and bank deposits in a separate legal vehicle, and the holder is that vehicle's creditor, not a part-owner of the bills.

The difference shows up in bankruptcy. At levels A and B you own a share of a fund whose assets sit with its own custodian, kept apart from the manager's money. At level C you hold a promise, and if the issuer fails you queue with its other creditors. Structures like USDY's add protections to soften that, which is exactly why reading the offering documents matters more than reading the product page.

The letters are a teaching device from this course, not a legal category. No regulator sorts products into A, B and C. The useful question to ask of any token is the one its documents answer: is this a share, a debt, or a receipt?

Deep dive Where BUIDL sits

Even the best-known products leave this open. Public descriptions of BUIDL say Securitize keeps the fund's share register on-chain, which would make it level A. Only the fund's offering memorandum and its agreement with the transfer agent settle whether the on-chain record is the legal register or a synchronized copy, and those documents are private. FOBXX shows why the detail matters: the fund's prospectus filed with the SEC describes book-entry record keeping alongside the public chains, under the transfer agent's control. Read closely, even the clearest level A in the market is a hybrid.

One market, three sizes

Ask how big the RWA market is and you will hear numbers that differ by a factor of ten. Usually nobody is lying. They are counting different things.

On 21 November 2025 the data provider RWA.xyz split tokenized assets into two groups. Distributed assets can leave the issuer's platform and move between wallets: an investor can hold them directly and send them on. Represented assets cannot. They use a blockchain as a bookkeeping tool inside a bank or a closed network, and no investor can take them out. Stablecoins meet the RWA test too, but everyone counts them as a separate market, partly because they are so large and partly because the Treasury bills in their reserves would otherwise be counted twice.

On 10 September 2026 RWA.xyz showed about 39 bn USD of distributed assets and about 387 bn USD of represented ones. Stablecoins, counted separately, were close to the represented figure. A headline that says the RWA market is "nearly 400 bn USD" is quoting the represented number, most of which no outside investor can touch.

The distributed number is the one this course treats as the market, because it is the part an on-chain investor can own. It is small and it is growing fast: from roughly 5 to 6 bn USD at the start of 2025 to almost 40 bn USD by September 2026, a growth that happened even though the November 2025 change moved assets out of the headline figure.

How this course is organized

The course has four levels. Each chapter covers how its topic started, where it stands in September 2026 and what to watch next, and each defines its terms from scratch.

A newcomer should read the Foundations and How it works levels in order. A practitioner can jump to The market today and use the earlier chapters as a reference. Stablecoins have their own twelve-chapter course, starting with what one USDC actually is, and company profiles such as BlackRock and Securitize sit alongside both.

What to watch next

• Which products publish their legal register model: the more issuers state plainly whether the chain is the official record, the less the A, B, C question depends on private documents.
• The distributed number, not the represented one: distributed value is the part investors can hold, so it is the honest gauge of adoption. A represented figure that jumps by tens of billions in a month usually means a new dataset was added.
• The DTC tokenization pilot: the SEC allowed DTC, the central settlement system for US securities, to run a three-year pilot of tokenized securities in December 2025, with commercial service planned for late 2026. If it runs at scale, mainstream stocks and bonds get an official token form.
• Wind-downs of small products: the most common way an RWA has ended so far is the issuer closing it, so closures and changes to redemption terms matter more than hacks.