BIS warns on shadow banking at exchanges

TLDR

The Bank for International Settlements (BIS) says big crypto exchanges increasingly behave like lightly regulated shadow banks, which raises solvency and systemic risk concerns for users and markets.

1. BIS argues exchanges now bundle trading, custody, lending, and yield products, turning user deposits into unsecured loans without bank-style protections.
2. This bank-like structure, combined with high leverage, has already contributed to events like a $19 billion liquidation cascade and failures such as Celsius and FTX.
3. Users should focus on how platforms custody and reuse assets, and regulators are likely to target these bank-like functions with tougher rules.

Deep Dive

1. How Exchanges Became Shadow Banks

In its latest report, the BIS says major crypto exchanges have evolved into multifunction cryptoasset intermediaries, combining roles normally split across banks, brokers, and exchanges. They often offer spot trading, derivatives, margin lending, staking, and earn products on a single balance sheet, with limited transparency about how user assets are reused or risk-managed.

According to the BIS, many yield or earn products marketed as passive income are, in practice, unsecured loans from customers to the platform or its affiliates, lacking deposit insurance or clear priority in bankruptcy, as highlighted in a recent BIS-focused analysis.

2. Concrete Risks: Leverage, Crashes, and Failures

The BIS links this model to past blowups. Celsius and FTX are cited as examples where customer funds were commingled with proprietary trading and lending, leaving users as unsecured creditors when the platforms failed.

The report also points to the October 2025 flash crash, when more than $19 billion of leveraged positions were liquidated in 24 hours and total crypto market value fell by about $350 billion, in part due to high leverage and thin liquidity concentrated on a few venues, as summarized in a related market risk review.

The concern is that as exchanges deepen links with banks and stablecoin issuers, stress on one large venue could propagate more like a banking problem than an isolated trading loss.

3. What Users And Regulators Will Focus On

For individual users, the key questions are:

1. Are your assets segregated, or can the platform rehypothecate (re-lend) them?
2. What do the terms of service say about ownership of coins in earn or margin accounts?
3. Is there regulatory oversight comparable to a securities broker or bank?

BIS suggests regulators should treat bank-like functions (taking deposits, making loans, promising yields) with bank-like rules, including capital, liquidity, and disclosure requirements, not just light-touch trading oversight, as discussed in the BIS shadow-banking warning.

Conclusion

BIS is effectively saying that large exchanges now look less like neutral marketplaces and more like lightly supervised banks that borrow short from users and lend or trade long. That structure can amplify crashes and leave customers exposed if a platform fails. The likely direction of travel is tighter, more bank-like regulation of these services and a growing premium on platforms that clearly separate pure trading from lending and yield activities.