As noted last week, I am happily receiving 9% interest in my new crypto account at BlockFi. How can they do that? The short answer is that BlockFi lends out my holdings to other parties, who pay somewhat more than 9% interest to BlockFi. This model is common to essentially all of the crypto brokers who pay out interest, but I will focus on BlockFi because (a) I have skin in the game there, and (b) they have been fairly transparent about their operations.
On the simplest level, this operates like a plain bank savings account does. A bank takes in funds from depositors, and (to oversimplify) lends those funds out to borrowers. The bank then pays to its depositors a portion of the interest it receives from its borrowers. Up until the last few years, this bank savings account model worked pretty well; a depositor might receive something like 2-3% interest on a savings account or certificate of deposit. More recently, short term rates have been near zero, so depositors get almost nothing in a bank savings account.
As noted earlier, BlockFi pays up to 4.5% interest on Bitcoin and 5% on Ethereum. These are leading, high volume coins that are widely used in decentralized finance (defi). Here is how BlockFi describes the parties to which it lends (mainly) Bitcoin:
Who Borrows Crypto?
BlockFi works with institutional counterparties for trading and lending cryptocurrency. These counterparties look to us to help them provide liquidity for their businesses. But who are some of these borrowers?
( 1 ) Traders and investment funds who see a fragmented marketplace and discover arbitrage trading opportunities. Arbitrageurs need to borrow crypto in order to close mispricing between exchanges or dispersed markets. Similarly, margin traders need to borrow in order to execute their trading strategies. This is a simple example, but it demonstrates how arbitrage and margin trading activities facilitate price discovery, which is an essential component of developed markets.
( 2 ) Over the counter (OTC) market makers make money by connecting buyers and sellers who do not want to transact over public exchanges. OTC desks need to keep inventory on-hand to meet their client demand. Owning crypto outright is capital intensive and comes with the attendant risks of price fluctuations. Instead, they may prefer to borrow inventory in order to facilitate transactions. Liquidity is another essential component to healthy markets.
( 3 ) Businesses that require an inventory of crypto to provide liquidity to clients. This bucket includes companies like crypto ATMs. These businesses also need to be able to support withdrawals while keeping the vast majority of their crypto assets in cold storage. The liquidity we provide them helps with these basic and important functions.
A key piece of this lending is to require that the counterparty post adequate collateral for the loans. This is somewhat similar to a bank lending you money to buy a house, with the house as collateral for your loan. If you lose your job and cannot pay back the loan, the bank has the right to sell your house to recovery its money. Similarly, BlockFi wants to ensure that if something goes sour with their loan of your Bitcoin, they can get their funds back and make your account whole. Obviously, BlockFi customers like me are relying on BlockFi to manage this properly and to minimize lending losses. BlockFi goes on to reassure us:Continue reading