Trillion-dollar hedge fund borrowing boom drives Wall Street prime brokerage profits

Hedge fund borrowing has become a major revenue engine for Wall Street banks, as large managers including Citadel, Millennium Management and Point72 rely on bank financing to fund their trading strategies, according to a Financial Times report. Borrowing from banks has tripled since 2020, and Coalition Greenwich expects equity and fixed-income prime brokerage revenues to reach $47.9bn this year. The expansion reflects a structural shift since the 2008 financial crisis: post-crisis regulation limited banks' speculative proprietary positions, pushing risk-taking toward hedge funds and specialist trading firms such as Jane Street and Citadel, which have also gained ground in market making. Banks have retained a central role by supplying financing, securities lending and other services to these non-bank participants.

The economics are attractive to banks because prime brokerage revenue is recurring. Banking executives cited by the FT said servicing a major hedge fund or proprietary trading firm can generate as much as $200m a year after trading costs. Coalition Greenwich estimates prime services will account for about 38% of banks' equities revenues this year, versus 10% in 2005; those figures exclude the substantial derivatives business banks provide to hedge funds. The growth is concentrated among a small group of large multi-manager funds and proprietary trading firms. Goldman Sachs estimates the largest multi-managers accounted for more than a third of industry trading activity last year while managing less than a tenth of total assets. Their scale allows banks to net offsetting client trades internally, reducing the need to source securities externally.

Leverage at the top end is substantial. Federal Reserve data show the 50 largest hedge funds borrow about $3 for every $1 of assets under management, rising to roughly $11 among the 15 largest; these figures do not capture derivatives exposure. One banking executive estimated effective leverage of 20 to 25 times for the largest funds once derivatives are included, and another said market makers can reach roughly 40 times. The Bank of England said in July that prime brokerage balances had risen about 40% over the previous year, and regulators are increasingly questioning whether exposure to non-bank financial institutions could create systemic vulnerabilities.

Competitive dynamics have shifted bargaining power toward the largest clients. Goldman Sachs and Morgan Stanley lead the prime brokerage business, followed by JPMorgan Chase, according to hedge fund executives, while Citigroup, Bank of America, BNP Paribas, Barclays and ABN Amro are expanding. Financing commitments that once lasted around two weeks now run for one month, three months and, for the most sought-after clients, up to six months. Such commitments can limit a bank's ability to cut financing or demand additional collateral in a downturn. Banks also have limited visibility into total leverage, since large funds spread business across several prime brokers and guard position details closely.

The risks are not hypothetical. The collapse of Long-Term Capital Management in 1998 and Archegos Capital Management in 2021 both illustrated how leverage spread across multiple brokers can go undetected; Archegos cost Credit Suisse $5.5bn and contributed to its takeover by UBS. More recently, banks narrowly avoided a major loss when AI-focused hedge fund Situational Awareness ran into trouble after a market reversal. Banks had provided billions of dollars in financing before Citadel acquired the fund's portfolio of public equities, helping prevent a disorderly unwind. Prime brokers say risk controls have strengthened, with tighter scrutiny of leverage, collateral and liquidity, but regulators warn that competition for the industry's most profitable clients could gradually loosen standards.