Prime Brokerage for Offshore Funds: What It Is and How New Managers Access It

What a Prime Broker Does

A prime broker is the institutional counterparty that provides a hedge fund with the operational infrastructure to execute its investment strategy. The prime brokerage relationship encompasses a bundle of services that together enable the fund to trade, borrow, and settle across global markets. The core services are:

• Custody: The prime broker holds the fund's assets in segregated or omnibus accounts, providing safekeeping and asset servicing (processing corporate actions, dividends, and coupon payments)
• Leverage and margin financing: The prime broker extends credit to the fund, allowing it to take leveraged positions. The margin terms — how much collateral is required relative to the borrowed amount — are a key commercial negotiation
• Securities lending: The prime broker lends securities to the fund for short selling, typically charging a borrowing fee based on the scarcity and demand for the specific security
• Trade execution: The prime broker provides access to exchanges, dark pools, and OTC markets for trade execution, either directly or through its executing broker affiliate
• Clearing and settlement: The prime broker settles trades on behalf of the fund, managing the delivery versus payment process across multiple clearinghouses and settlement systems
• Capital introduction: The prime broker's capital introduction team connects fund managers with potential investors (pension funds, endowments, fund of funds, family offices) — though no commitments are made

The Prime Brokerage Agreement

The legal documentation governing the prime brokerage relationship typically includes:

• Prime Brokerage Agreement (PBA): The master agreement setting out the terms of the custody, lending, and financing relationship
• ISDA Master Agreement: If the fund trades OTC derivatives (interest rate swaps, credit default swaps, total return swaps), a separate ISDA agreement is required with the prime broker's swap affiliate
• Account Control Agreement: If the fund uses multiple prime brokers or has a separate custodian, an account control agreement governs the movement of assets between accounts
• Margin and collateral terms: Typically documented in a schedule or side letter to the PBA, specifying initial margin, maintenance margin, and the prime broker's rights in a margin call scenario

Negotiating these documents takes 2–4 months for a new fund and requires experienced legal counsel. The prime broker's standard terms are heavily weighted in its favour, and managers should carefully negotiate:

• Rehypothecation limits (the prime broker's ability to use the fund's assets for its own purposes)
• Termination provisions and the cure period for margin calls
• Cross-default provisions with other counterparty relationships
• Portability of positions if the prime brokerage relationship is terminated

Tiered Access: The Reality for New Managers

The prime brokerage industry is stratified into tiers based on the size and institutional profile of the fund:

Tier One (Bulge Bracket): Goldman Sachs, Morgan Stanley, J.P. Morgan, and Bank of America Merrill Lynch. These prime brokers typically require:

• Minimum AUM of US$200M–US$500M at launch
• An established investment team with institutional pedigree
• A strategy that generates meaningful revenue (margin lending, securities lending, execution commissions)
• Institutional investors on the cap table (or confirmed allocations)

Tier Two (Mid-Market): Barclays, UBS, Citigroup, Jefferies, and Wells Fargo. These brokers may accept funds launching with:

• US$50M–US$200M AUM
• A credible track record (even if from a prior role)
• A clear growth trajectory and institutional fundraising plan

Tier Three (Emerging Manager Specialists): Interactive Brokers, Clear Street, Wedbush Securities, StoneX, and Cowen (now part of TD Securities). These providers cater to:

• Funds launching with US$5M–US$50M AUM
• First-time managers with limited institutional relationships
• Strategies that do not require complex OTC derivative trading or securities lending

New managers almost invariably start at Tier Three and migrate upward as AUM grows. The commercial reality is that prime brokers earn revenue from the fund's trading activity and financing balances, and a small fund does not generate sufficient revenue to justify the operational cost of onboarding and servicing.

What New Managers Should Expect

A manager launching an offshore fund with US$10M–US$30M AUM should expect the following prime brokerage terms:

• Margin rates: Fed Funds rate + 50–150 basis points for long margin, with higher rates for concentrated or illiquid positions
• Short selling: Available but limited to easy-to-borrow securities. Hard-to-borrow names may have locate fees of 1%–20%+ annualised
• Custody fees: May be waived or charged at US$5,000–US$15,000 per annum depending on the broker
• Minimum revenue commitment: Some brokers require minimum monthly commission commitments (US$2,000–US$10,000 per month)
• Technology: Access to the broker's trading platform, risk management tools, and reporting systems. Quality varies significantly by tier

Multi-Prime Arrangements

As a fund grows beyond US$50M–US$100M AUM, it is common practice to establish relationships with two or more prime brokers. The benefits of a multi-prime arrangement include:

• Counterparty risk mitigation: Diversifying custody and financing across multiple counterparties reduces the impact of a single broker's failure (as demonstrated during the 2008 financial crisis when Lehman Brothers' prime brokerage clients faced significant losses)
• Best execution: The ability to route trades to whichever broker offers the best execution or lowest borrowing cost
• Leverage negotiation: Multiple prime brokers compete for the fund's business, improving margin terms and service levels
• Operational resilience: If one prime broker experiences technology issues or capacity constraints, the fund can continue trading through the other

Multi-prime arrangements require a portfolio management system that can aggregate positions and calculate exposure across multiple brokers, as well as an administrator that can reconcile holdings across multiple custody accounts.

ISDA Agreements and OTC Derivatives

For funds that trade OTC derivatives — total return swaps, interest rate swaps, credit default swaps, or FX forwards — a separate ISDA Master Agreement is required with each counterparty. The ISDA negotiation involves:

• Credit Support Annex (CSA): Governs the collateral arrangements, including initial margin, variation margin, eligible collateral types, and minimum transfer amounts
• Schedule: Modifies the standard ISDA terms to reflect the specific commercial terms of the relationship
• Netting: Close-out netting provisions that allow all transactions to be netted to a single amount in the event of a default

For a new fund, obtaining ISDA terms is challenging. Swap counterparties conduct extensive credit due diligence on the fund and may require:

• Minimum fund size (typically US$50M+)
• An established administrator and auditor
• Limitations on the notional amount of derivatives the fund can enter into
• Daily or weekly margin calls rather than the monthly calls available to larger funds

The Capital Introduction Function

Prime brokers offer capital introduction services — arranging meetings between fund managers and potential investors. The value of this service depends on the prime broker's investor network and the manager's strategy profile:

• Tier-one brokers have extensive relationships with large institutional allocators and can arrange meetings with pension funds, sovereign wealth funds, and endowments
• However, capital introduction meetings are introductions only — the prime broker does not make investment recommendations or guarantee allocations
• The conversion rate from capital introduction meetings to actual allocations is low (typically 1%–5%), and managers should not rely on capital introduction as their primary fundraising strategy
• Smaller brokers may offer more targeted introductions to family offices and emerging manager allocators who specifically seek smaller funds

Key Takeaways

• Prime brokers provide the operational backbone for hedge fund trading: custody, leverage, securities lending, execution, and settlement
• New managers launching with under US$50M AUM will typically start with Tier Three providers (Interactive Brokers, Clear Street, StoneX) and migrate to larger brokers as AUM grows
• The prime brokerage agreement, ISDA documentation, and margin terms require experienced legal counsel — standard broker terms are heavily weighted in the broker's favour
• Multi-prime arrangements become advisable at US$50M–US$100M AUM to mitigate counterparty risk and improve execution and financing terms
• Capital introduction services are a supplementary benefit but should not be relied upon as the primary fundraising strategy — conversion rates are typically 1%–5%
• OTC derivative access via ISDA agreements is difficult to obtain for funds under US$50M AUM, and new managers should plan their strategy accordingly