Traditional vs DeFi Prime Brokerage: Counterparty Risk, Custody and Rehypothecation

Prime brokerage (PB) has long been a cornerstone of traditional finance (TradFi), offering a suite of essential services to institutional investors, hedge funds, and asset managers. However, with the rise of decentralized finance (DeFi), a new paradigm is emerging—one that redefines the traditional PB model and mitigates some of its inherent risks, most notably counterparty risk. In this post, we’ll explore the key differences between traditional PB and DeFi PB. We’ll also look at how Arkis keeps client collateral off exchanges.

Understanding Prime Brokerage

Prime brokerage, at its core, provides a range of services that enable hedge funds and large institutional investors to execute trades, manage assets, and leverage their portfolios effectively. Traditionally dominated by large financial institutions, PB plays a critical role in the financial markets by facilitating liquidity, managing risk, and providing access to capital.

Services Provided by Traditional PB

• Trade Execution: Prime brokers offer sophisticated trade execution services, enabling clients to buy and sell securities across multiple markets quickly and efficiently.

• Custody and Settlement: PBs provide custody services, holding clients' assets and ensuring the proper settlement of trades, which involves the transfer of securities and cash between buyers and sellers.

• Financing and Margin Lending: Through margin lending, PBs allow clients to borrow funds to leverage their investments. This service is critical for hedge funds seeking to amplify their returns.

• Risk Management and Reporting: Prime brokers offer comprehensive risk management tools and reporting services, helping clients monitor and manage their exposure to market risks.

Understanding DeFi Prime Brokerage

By leveraging blockchain technology and smart contracts, DeFi PB addresses many of the inefficiencies and risks associated with traditional PB, offering a more transparent, secure, and accessible alternative. These platforms are designed with efficient, automated processes that reduce the need for manual intervention, resulting in faster and more accurate execution of trades and settlements.

DeFi PB also taps into vast, decentralized liquidity pools, providing dynamic and accessible liquidity without the bottlenecks of traditional finance. Furthermore, they are inherently borderless, offering services to anyone worldwide while empowering users with full control over their assets, independent of intermediaries.

Services Provided by DeFi PB

• Automated Trading and Liquidity Provision: DeFi PB platforms enable automated trading and liquidity provision through decentralized protocols, allowing users to interact with a global pool of liquidity without relying on intermediaries.‍

• Smart Contracts for Custody and Settlement: Custody and settlement in DeFi PB are handled by smart contracts, which are self-executing agreements coded on the blockchain. This automation reduces the need for manual intervention and minimizes the risk of human error.

• Decentralized Lending and Borrowing: DeFi PB platforms offer decentralized lending and borrowing services, where users can lend their assets or borrow against collateral through peer-to-peer mechanisms, all governed by transparent smart contracts.

• Transparent Risk Management Protocols: Risk management in DeFi PB is built into the protocol, with transparent algorithms and governance mechanisms ensuring that all participants are aware of the risks and can act accordingly.

What is counterparty risk in prime brokerage?

Counterparty risk is the risk that the other party to a trade, loan or custody arrangement fails to meet its obligations. In prime brokerage the main counterparty is the broker itself, because it holds client assets, lends against them and stands between the client and the market.

One of the most significant risks in traditional PB is counterparty risk, the possibility that the broker may default on its obligations, leading to substantial financial losses for clients. 

This risk became painfully evident during the 2008 financial crisis, when the collapse of Lehman Brothers caused widespread disruption across the financial markets. Lehman Brothers, one of the largest investment banks in the world at the time, was deeply involved in prime brokerage services. When it filed for bankruptcy in September 2008, it triggered a cascade of financial failures. Lehman’s clients, including hedge funds and institutional investors, suddenly found themselves unable to access their assets held by the bank, leading to severe liquidity crises across the financial system. 

The bank’s failure to meet its obligations exposed the fragility of relying on a single counterparty, underscoring how interconnected and vulnerable the financial system had become. This event highlighted the inherent dangers in the traditional PB model, where clients must place immense trust in their broker’s financial stability—a trust that, as Lehman’s collapse demonstrated, can be catastrophically misplaced.

In the traditional PB model, counterparty risk is inherent due to the centralized nature of these services. Clients must trust that their broker is financially stable and capable of fulfilling its obligations. However, this trust is not always justified, as history has shown.

While many DeFi PBs aim to reduce or eliminate counterparty risk by relying on decentralized protocols, not all DeFi PB platforms fully achieve this. Some DeFi platforms still incorporate elements of centralized control or rely on third-party custodians, which reintroduces counterparty risk. For example, if a DeFi platform uses a centralized entity to manage user assets or facilitate certain transactions, users are again exposed to the risk that this entity could default or fail to act in their best interest. This partial reliance on centralized components can undermine the core benefits of decentralization, leaving users vulnerable to the same risks that DeFi was designed to avoid.

How Arkis reduces counterparty risk

Arkis is an institutional prime broker that margins CeFi, DeFi and TradFi positions as one portfolio, and has deployed more than $400 million in credit. No prime broker can remove counterparty risk entirely, and Arkis narrows where it sits: client collateral stays with a custodian, positions on every venue are visible in one place, and liquidation follows rules set in advance.

Collateral stays off the exchange

For centralized venues, Arkis settles off-exchange through Copper's ClearLoop network. Client collateral is held in a single pool in Copper's custody and is mirrored to each connected venue for margin, so the assets never sit on an exchange. If an exchange fails, the collateral is not on its balance sheet. More on Arkis custody.

Credit terms are kept on-chain

Loans originate on-chain, through Arkis vaults. A lender funds a dedicated vault, the vault allocates to a market, and the loan and the borrower's collateral are locked together in the borrower's margin account. The details of each credit agreement, including the whitelisted assets and trading venues, are kept on-chain, where the lender can check them.

Rehypothecation: Lender Control and Transparency

Rehypothecation, a common practice in traditional prime brokerage, allows brokers to reuse clients' collateral for their own purposes, often without the clients' explicit consent or full awareness. Rehypothecation is also used by several DeFi prime brokerages. This practice introduces significant risks, including reduced transparency and potential conflicts of interest. At Arkis, a facility can be set up with or without rehypothecation. Lenders can see how the collateral behind their loans is used. Lenders can whitelist specific assets and set clear conditions under which borrowers can use the collateral. This transparency ensures that all parties are fully informed and that their assets are not being used in ways they did not approve.

Margin Accounts and Clusters

A client can hold several margin accounts and group them into clusters. Each cluster brings the client's accounts across connected venues under one Health Factor, and clusters are kept apart, so a loss in one does not reach another. This structure simplifies risk management by ensuring that the risk does not cascade through multiple accounts or across the system. If a position needs to be liquidated, it happens in a controlled and predictable manner according to our defined rules, reducing the potential for widespread disruption or loss.

Transparent and Predictable Smart Contract Risk

For on-chain positions, audited smart contracts enforce what each margin account can trade and where its assets can move. The rules sit in the code, where auditors and clients can check them.

Conclusion

As the financial landscape continues to evolve, the distinctions between traditional and DeFi prime brokerage remain significant. Traditional PBs rely on centralized entities, which often expose clients to counterparty risk—such as the risk that the PB itself may default on its obligations. This vulnerability was starkly illustrated by the 2008 collapse of Lehman Brothers.

Arkis handles the same problem in three ways. Client collateral stays in Copper's custody and off the exchanges, positions on every venue sit under one portfolio margin, and liquidation follows rules set in advance.

Arkis also runs Concourse, which gives clients one onboarding to more than 20 OTC derivatives desks, with a single request reaching every desk at once.

Trading firms can reach the Arkis team through the contact form on arkis.xyz.

Frequently asked questions

What is counterparty risk?

The risk that the other side of a trade, loan or custody arrangement fails to meet its obligations, leaving the client with a loss or with assets it cannot reach.

What is counterparty risk in prime brokerage?

The risk that the prime broker defaults while it holds client assets or owes clients money. Lehman Brothers' prime brokerage clients in 2008 are the best-known case.

What is rehypothecation?

A broker reusing a client's collateral for its own purposes, such as lending it on or pledging it for its own borrowing. It earns the broker money and leaves the client exposed if the broker fails.

Does DeFi prime brokerage remove counterparty risk?

It moves the risk. Smart contracts replace some of the trust placed in a broker, but they add smart contract risk, and many DeFi platforms still rely on centralized custodians or operators.

How does off-exchange settlement reduce counterparty risk?

Collateral stays with a custodian and is mirrored to the exchange for margin, so an exchange failure does not trap the client's assets.