What Are Synthetic Tokens? Price Exposure vs Ownership and What Can Go Wrong
Synthetic tokens track the price of gold, stocks or currencies without giving you the asset. Learn how they work, the difference from tokenized assets and the risks.
You may see tokens that follow the price of gold, a stock, a currency or another cryptocurrency. They look like the real thing, but many of them are not backed by the asset they track. They are called synthetic tokens. This article explains what they are, how they work, how they differ from tokenized assets and what can go wrong.
What is a synthetic token?
Chainlink describes a synthetic asset as a tokenized financial instrument that tracks the value of another asset. You get price exposure, which means that your gain or loss follows the price, but you do not own the underlying asset. Holding a token that tracks gold does not mean you hold a specific bar of gold or have a claim on one.
Synthetic vs tokenized: an important difference
These two are often mixed up, and the difference matters:
- Tokenized asset: according to Chainlink, it typically represents a direct legal claim to collateral held in a vault. Our guides on tokenized gold and on real-world asset tokens cover this category.
- Synthetic token: it is a derivative. It provides price exposure rather than ownership, and what stands behind it is usually collateral locked in a smart contract and a price feed, not the asset itself.
The line can blur in marketing. A token labelled as a "stock" or "gold" may be either, so read what the issuer says it gives you.
How synthetic tokens work
Based on Chainlink's explanation:
- Collateral. Users deposit crypto, such as a stablecoin or the platform's own token, to mint synthetic tokens. The system is typically over-collateralised: for example, minting $100 of a synthetic dollar might require $150 or more in collateral.
- Liquidation. If the collateral falls in value or the synthetic token's value rises too far, the smart contract can sell collateral to repay the debt.
- Price feeds, called oracles. A blockchain does not know the price of gold or a stock, so the contract relies on an oracle to deliver it. The contract uses that price to calculate how healthy each position is.
Some platforms also offer perpetual futures, which are contracts without an expiry date that follow an asset's price. They are another way of getting price exposure without holding the asset.
What can go wrong
Chainlink's own overview lists the main risks:
- Oracle risk. If the price feed is manipulated or wrong, the synthetic token's price can freeze or become inaccurate.
- Collateral risk. In a fast market fall, liquidations may not keep up, which can lead to the token losing its link to the price it tracks.
- Liquidation risk. Forced selling during volatility can amplify losses.
- De-pegging. The token can drift away from the asset it tracks. See can a stablecoin lose its peg for how this looks in practice.
- Smart contract bugs and legal uncertainty. Tokens that imitate securities may face unclear legal treatment, depending on where you live.
Two examples show how oracle problems play out:
- Synthetix, June 2019. The Block reported that the price feed for a synthetic Korean won token returned an incorrect value. According to the company's co-founder, an automated arbitrage bot converted funds while the feed was wrong, and the platform disabled transfers while it investigated. The Block reported that, according to Etherscan, the attacker obtained more than 37 million units of a synthetic ether token, and that the real dollar value was hard to determine because that token was illiquid.
- Mango Markets, 2022. Blockworks reported that an attacker inflated the price of the platform's collateral and then took loans of about $112 million. Security researchers confirmed the loan figure and the mechanism, while claims about exactly how the price was moved were alleged and not confirmed in that report. We do not name anyone here. For the outcome, read the official court and platform records yourself.
These are examples of how oracle problems can occur, not statements about any platform you may use today.
Fakes and look-alikes
Because "tracking" is easy to claim, synthetic tokens are also used as a label for things that are not what they claim:
- A token with a famous stock or gold name that has no link to any real price feed.
- A copy of a real synthetic token under a similar name. See wrapped vs native tokens for how to avoid the wrong copy.
- Offers on social media of "tokenized shares" or "gold tokens" sold through intermediaries. See tokenized commodities beyond gold.
What to check before you hold or trade a synthetic token
- What does it give you? Price exposure only, or a legal claim? Read the issuer's own documentation.
- Where does the price come from? Find out which oracle the platform uses and what happens if it fails.
- How is it backed? Check the collateral and how much extra the system requires.
- Who can change the rules? Check whether an administrator can change parameters or pause the system.
- Is the platform allowed to offer it where you live? Ask your national regulator, because rules for tokenized securities and derivatives vary widely.
- Is this the official contract? Verify the contract address from the issuer's site, not from a search result or a message. To look at a token's address, you can sign up or log in to ScamSonnar with Google or a magic link.
What this article cannot tell you
We do not know how large the synthetic token market is today, and we have not tested any platform. Platforms, collateral rules and oracles change quickly, so verify every detail on the issuer's current documentation before you rely on it.
This article is for general information only and is not financial or legal advice.