Securities lending allows asset owners to earn incremental returns by temporarily transferring securities to borrowers for collateral. Institutional investors use this strategy to offset custody costs and generate yield on idle portfolio holdings.
Securities lending is the practice of temporarily transferring securities held in a custodian account to a borrower (typically a short seller or derivatives dealer) in exchange for collateral and a lending fee. For institutional investors managing trillions in assets, securities lending generates incremental yield on idle holdings while creating liquidity pathways that fund short sales, derivatives hedging, and market-making activities across global capital markets.
How do securities lending programs actually work?
The mechanics are straightforward, though operationally complex. An asset owner—a pension fund, endowment, or sovereign wealth fund—deposits securities into a lending program administered by a custodian or third-party lender. The borrower posts collateral (typically cash or government securities) at a margin level set by the lender (usually 102–110% of the borrowed security's value). The borrower pays a fee—typically 5–50 basis points annually for equities, lower for government bonds—and the asset owner retains beneficial ownership and receives dividends or interest while the security is on loan.
This structure has two immediate consequences. First, it converts what might otherwise be dead capital—the latent value of a fully funded, buy-and-hold position—into productive yield. CalPERS, with $466 billion in assets under management as of June 2024, generated $287 million in securities lending revenue in fiscal year 2023, according to its annual financial report. Second, it creates a liquidity and stability function for markets by enabling short selling and hedging activities that would otherwise be constrained.
The custodial infrastructure is crucial. BNY Mellon, State Street, and JPMorgan all run large securities lending operations that aggregate demand from thousands of borrowers against holdings from thousands of lenders. These intermediaries bear counterparty risk, manage collateral optimization, handle corporate action rebates (dividends paid to the borrower, reimbursed to the lender), and settle loans with operational precision.
What risks should asset owners understand before lending securities?
The principal risk is counterparty default. If a borrower fails to return securities or post adequate collateral during a market dislocation, the lender faces a shortfall. This risk crystallized visibly during the 2008 financial crisis: Lehman Brothers' collapse left securities lenders holding unsecured claims on Lehman's collateral pool. More recently, in March 2023, the market stress around SVB and regional banks created temporary repricing in lending fee markets, though systematic losses were limited due to conservative collateral haircuts.
A second risk is collateral opacity. When a borrower posts non-government collateral—corporate bonds, mortgage-backed securities, or equities—its credit quality matters. During periods of stress, posted collateral can depreciate faster than the lender can liquidate it, creating a gap. Prudent lenders require daily mark-to-market rebalancing of collateral and low concentration in any single issuer.
Third is the operational and legal risk of corporate actions. When a company pays a dividend while a share is on loan, the borrower typically receives the dividend payment, and the lender receives a rebate from the borrower. But in some jurisdictions, voting rights and tender offer mechanics create ambiguity. This is particularly acute for asset owners with stewardship responsibilities, as securities lending temporarily separates voting power from economic interest.
A fourth consideration is tax efficiency. Securities lending revenue is typically taxable as ordinary income, not capital gains, in most jurisdictions. For tax-exempt institutional investors this is neutral; for taxable funds it creates drag.
Which asset owners generate material income from securities lending?
Large, diversified holders with substantial passive allocations generate the most lending income, because equity and bond holdings with long investment horizons and stable positioning are precisely what borrowers need. The California State Teachers' Retirement System (CalSTRS), with $325 billion in assets as of June 2024, reported $156 million in securities lending income in fiscal year 2023. The NY State Common Fund generated approximately $89 million from securities lending in 2023, according to its public disclosures.
Sovereign wealth funds also participate actively. The Government Pension Investment Fund (GPIF) of Japan, the world's largest pension fund with approximately $1.4 trillion in AUM, permits securities lending through its custodians as part of its yield enhancement strategy, though it does not disclose lending revenue separately.
The aggregate scale is material. According to data from the Securities Industry and Financial Markets Association (SIFMA), U.S. equity and corporate bond lending fees totaled approximately $2.3 billion in 2022 (the most recent year of comprehensive disclosure). Lenders captured roughly half of this revenue after costs and intermediary fees, implying that U.S. institutional lenders collectively earned in excess of $1 billion annually from securities lending alone.
However, participation varies sharply by fund type and philosophy. Some asset owners, particularly those with strong stewardship for universal owners mandates, restrict or prohibit lending of shares in companies where voting engagement is active. Others view the income as immaterial relative to total portfolio returns and the operational burden of monitoring counterparty risk.
How does securities lending fit into a total portfolio approach?
For long-horizon investors, securities lending revenue should be understood within a total portfolio approach framework, not as a standalone income strategy. The yield it generates—typically 20–60 basis points for a diversified portfolio—is not negligible, but it is small relative to expected equity and bond returns. Its value lies in two places: optionality and cost reduction.
First, securities lending revenue reduces the net cost of core holdings. A €50 million position in a European large-cap equity that generates 30 basis points in annual lending fees costs 30 bps less to hold. Over decades, this compounds.
Second, permitting lending creates a market depth function. When asset owners cooperate in securities lending, they effectively fund market-making, short-selling demand, and derivatives hedging that otherwise would require more expensive mechanisms (convertible bonds, puts, swaps). This is particularly important for private markets allocators who may use equity derivatives or short sales for portfolio construction or tactical rebalancing.
The tension arises when lending revenue comes at the cost of liquidity risk or stewardship clarity. An asset owner that lends 40% of its holdings in a small-cap equity to a short seller may improve yield by 5 bps but compromises its ability to execute an exit or control voting outcomes.
What should governance frameworks require?
Institutional investors should establish explicit written policies governing securities lending, including:
- Borrower eligibility: Which counterparties (clearinghouses, primary dealers, hedge funds) are permitted, and what credit thresholds apply?
- Collateral standards: What instruments are acceptable (cash, governments, investment-grade corporates), what haircuts apply, and at what frequency is rebalancing required?
- Lending restrictions: Which securities are prohibited from lending (typically those subject to active stewardship engagement or those in concentrated positions)?
- Fee benchmarking: Are lending fees set to market rates, or are there minimum thresholds?
- Reporting and audit: Who monitors counterparty risk, collateral quality, and fee recovery? How often?
This framework should be reviewed annually by the investment committee or board, and fees should be tracked and reconciled against benchmarks published by SIFMA or third-party providers like IHS Markit.
Implications for long-term capital allocators
Securities lending is a mature, operationally sound mechanism for converting idle capital into modest yield. For the very largest asset owners—pension funds with $100 billion+ in AUM, sovereign wealth funds, large endowments—the infrastructure is robust, counterparty risk is well-contained through custodial intermediation, and the income is material enough to warrant governance attention.
For smaller asset owners, the operational burden may exceed the benefit unless managed through a passive aggregate program offered by the custodian.
The critical consideration is alignment with broader stewardship and net zero portfolio commitments. An asset owner cannot meaningfully engage with company management on capital allocation or climate strategy if it has lent away voting rights on a large portion of holdings. Similarly, lending concentrated positions to short sellers creates narrative risk if the lender is simultaneously making a public commitment to long-term value creation.
The best institutional practice treats securities lending as a utility function—economically useful, but subordinate to core investment and stewardship objectives. Revenue should be tracked, counterparties should be monitored, and lending should be restricted on holdings where governance or strategic engagement matters. This preserves the economic benefit without compromising institutional purpose.