Wrapped tokens (WBTC, cbBTC and others): what they are and why they lose their peg

Wrapped tokens (WBTC, cbBTC and others): what they are and why they lose their peg

Wrapped tokens carry an asset from one network to another. The best-known case is Bitcoin that people want to use on Ethereum and other smart contract networks.

Ideally, a wrapper costs exactly as much as the original. In practice, the price sometimes drifts away, and in this guide we look at why this happens and what an arbitrage trader should do about it.

What wrapped tokens are in simple terms

A wrapped token is a receipt for an asset. Someone holds real Bitcoin in reserve and, on another network, issues a token that promises a one-to-one exchange.

As long as the reserve is in place and the exchange works, the token behaves like Bitcoin. You can put it into DeFi, post it as collateral or sell it on an exchange.

How wrapping works: custodian and bridge

There are two main methods. In the first, Bitcoin is held by a custodian - a company that accepts coins, issues tokens and burns them on the reverse exchange.

In the second, the custodian's role is taken by a bridge: a set of smart contracts and independent participants who jointly sign issuance and redemption. Trust is distributed here, but code risk is added.

Wrappers within a single network, like WETH, stand apart. There, Ether is simply locked in a smart contract, with no external custodian at all.

How WBTC, cbBTC and other models differ

In our view, it helps to ask yourself one question: who will give me back the real asset, and what happens if they do not? The answer is the main risk of the wrapper.

Why a wrapped token loses its peg

A wrapper's price stays close to the original as long as the one-to-one exchange works. Any obstacle to this exchange opens a gap.

• Doubts about the custodian: news of a change of ownership, reserve problems or regulators immediately creates a discount.
• Bridge problems: a hack, a pause in operations or a contract bug block redemption.
• Weak liquidity: on a small exchange or in a shallow pool, a large sale moves the price more than on the main market.
• Limited access to redemption: if only the custodian's partners can burn the token directly, everyone else has to wait for the market.

From what we see, small deviations of fractions of a percent are usually tied to liquidity and close quickly. A large and persistent discount more often signals doubts about the reserve itself.

How arbitrage arises on a wrapped token deviation

The logic is simple. If the wrapper is cheaper than Bitcoin, you can buy it and then redeem it for the original or wait for the price to come back.

To avoid depending on the moves of Bitcoin itself, the second leg is usually opened as a short on a futures contract. Then the result depends only on the wrapper converging with the original.

A hypothetical example

The numbers are for illustration. Bitcoin costs 80,000 dollars, and the wrapped token on one venue costs 79,680, a discount of 0.4%.

The trader buys one token and at the same time shorts one Bitcoin on a futures contract. If the prices converge, they will get about 320 dollars before costs.

From this, subtract the fees for both legs, funding on the short for the waiting period and the cost of transfer or redemption. And if the discount grew because of reserve problems, it may never close at all.

What makes wrapped token arbitrage dangerous

The main risk is that the discount can be justified. The market may be pricing in a real probability that the reserve will not be returned in full.

The second risk is time. Redemption through a custodian or bridge takes hours or days and is sometimes available only to a limited circle of participants.

We believe it is sensible to start wrapper arbitrage with small sizes and only with tokens whose redemption path is clear. If it is not clear who will return the asset, the discount is not an opportunity but a warning.

Our tools

A wrapped token's deviation from the original can only be seen by comparing prices across many venues at once, together with the volume you can actually take. Our arbitrage screener keeps dozens of venues in one window, refreshes quotes every second and shows each gap together with the volume actually behind it. The spread calculator helps you check what survives fees, network costs and slippage at your size. The bot is fully manual. It never connects to your exchange API keys.

To test the tools on a live market, ArbitrageScanner offers one day of free access to the whole ecosystem.

FAQ (Frequently Asked Questions)

1. What is a wrapped token in simple terms?

A receipt for an asset on another network. Someone holds the original in reserve and issues a token in return, with a promise of one-to-one exchange.

2. How does WBTC differ from cbBTC?

Both wrap Bitcoin through a custodian. For cbBTC, the reserve is held by Coinbase; for WBTC, issuance goes through a custodian and a network of merchant partners.

3. Why is WBTC cheaper than Bitcoin?

Usually because of liquidity on a specific venue. A large and long-lasting discount is more often tied to doubts about the custodian or the bridge.

4. Can you make money on a wrapped token deviation?

The trade is built on buying the wrapper at a discount and shorting the original. But the discount may reflect a real reserve risk and never close.

5. Is it safe to hold wrapped Bitcoin?

The risk is higher than with regular Bitcoin: you add trust in the custodian or the bridge code. It is worth considering when choosing a wrapper.

Conclusion

Wrapped tokens carry Bitcoin and other assets into other networks. The price stays near the original as long as the one-to-one exchange works, and a failure at the custodian, the bridge or in liquidity opens a gap.

Arbitrage on such gaps is possible, but it is not free money. Before entering, understand the redemption path, calculate the costs and remember that a discount sometimes reflects a real risk.

IMPORTANT! We are software developers. We do not give recommendations or promises of earnings and we do not advise you to invest your money anywhere. Our software is fully manual, all your money stays under your own control. We show examples of how our clients have earned on arbitrage in the past, but we do not advise repeating those actions one to one. Your earnings depend solely on your own actions and on market factors.