Rehypothecation of customer deposits: how exchanges lend your crypto
The term sounds complicated. The mechanism is simple. Rehypothecation means an exchange takes customer deposits and lends them out to generate yield. The customer often does not consent explicitly; permission is buried in user agreements few people read.
This practice creates counterparty risk. If the borrower defaults, the exchange may lack the assets to return deposits. The customer becomes an unsecured creditor in bankruptcy proceedings. The money is gone before the exchange fails.
How Rehypothecation Worked at Celsius, Voyager, and BlockFi
Celsius Network accepted customer crypto deposits and lent those assets to institutional borrowers. Voyager Digital operated similarly. BlockFi did the same. All three companies rehypothecated customer funds as a core business model.
The borrowers included firms like Three Arrows Capital (3AC) and Alameda Research. 3AC was a hedge fund. Alameda was a trading firm. Both took large loans from these lending platforms. When 3AC collapsed in June 2022, Celsius and Voyager faced immediate liquidity crises. BlockFi had exposure to both 3AC and Alameda, and the contagion spread.
Celsius filed for bankruptcy in July 2022. Voyager followed that same month. BlockFi filed in November 2022. In each case, customer withdrawals were frozen. Rehypothecation had transferred customer money to entities that could not repay, and the exchanges had no reserves to honor withdrawal requests.
The spot wallet versus earn product distinction
Not all funds on an exchange face the same risk. Money in a spot wallet is held for immediate trading. Exchanges typically do not rehypothecate those assets. The exchange holds them in custody. That is the claim, at least.
Funds moved into an "earn" or "yield" product enter a different bucket. The user agreement for an earn product usually grants the exchange permission to lend those funds. The customer trades custody for interest. The exchange takes the risk. The customer bears the loss when the borrower defaults.
Celsius offered "Earn" accounts. Voyager had a "Voyager Yield Program." BlockFi ran "BlockFi Interest Accounts." In each case, users who opted in agreed to rehypothecation. Those who kept funds in spot wallets often saw their assets frozen anyway. The commingling of customer funds with operating capital made segregation impossible in practice.
Why Rehypothecation Matters
The practice is legal in many jurisdictions and common in traditional finance. Securities brokers rehypothecate customer assets. The difference is that crypto exchanges operate with less regulatory oversight and fewer capital requirements. A traditional brokerage must meet net capital rules. Many crypto exchanges had no such constraints.
The result is a system where customer deposits become borrowed money the exchange uses to operate. The exchange borrows short (customer deposits) and lends long (loans to hedge funds). A sudden market move or a borrower default triggers a liquidity crisis. Withdrawals halt. The exchange files for bankruptcy.
Customer funds are then subject to the bankruptcy process. Depositors stand in line with other unsecured creditors. They often recover only a fraction of their assets. Some recover nothing. The money that was lent out may be gone forever.
What this means for users
A user holding crypto on an exchange should understand where the funds sit. A spot wallet offers some protection if the exchange segregates assets. An earn product explicitly accepts rehypothecation risk. The difference is defined in the terms of service.
Reading those terms is the only way to know. Most users do not. Rehypothecation was a primary cause of the 2022 crypto lending crisis. It is not an obscure technicality. It is a fundamental risk built into many exchange business models.
The practice persists. Some exchanges disclose their lending activities. Most do not clearly. Rehypothecation remains legal in many places. The lesson is straightforward: if an exchange can lend your assets, your assets are not safe when the borrower defaults.
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