Securities Lending Overview: Processes, Pros, and Risks

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Securities lending is the temporary transfer of a security, such as a stock, bond or ETF share, from one party to another. The borrower posts collateral and pays a fee, and agrees to return equivalent securities on demand or at the end of an agreed term. The lender keeps economic exposure to the security’s price but gives up the legal rights attached to the shares while they are on loan. Loans usually run between institutions, broker-dealers and lending agents, and many brokerages also let individual investors lend shares they own outright through fully paid lending programs.

How Securities Lending Works

A loan rests on a written securities lending agreement. It sets the loan’s duration (fixed term or open, meaning either side can end it), the fee or rebate rate, the acceptable types of collateral, how collateral is adjusted, and what happens with dividends, interest and corporate actions.

The typical participants are:

• Lenders: pension funds, insurance companies, mutual funds and ETFs, endowments, and retail customers enrolled in a broker’s program.
• Lending agents: custodian banks or specialist firms that run lending programs for asset owners, find borrowers, manage collateral and take a share of the revenue.
• Borrowers: broker-dealers, hedge funds (usually through a prime broker) and market makers.

Collateral protects the lender. Regulatory standards generally call for collateral worth at least 100% of the loaned securities, and in practice initial collateral is often set at 102% or more of market value, plus accrued interest when the loaned item is a debt security. Requirements can rise with the security’s volatility. Positions are marked to market, usually daily: if the loaned stock rises, the borrower posts more collateral. If it falls, excess collateral can be returned.

Ownership transfers in the legal sense, but the lender’s exposure does not. If the stock doubles while on loan, the lender gets back the same number of shares, now worth twice as much. The lender can normally recall the shares, and the borrower must return them within the standard settlement cycle or arrange a replacement.

How the lender gets paid

Compensation depends on the type of collateral:

• Noncash collateral (government bonds, other securities): the borrower pays a negotiated loan fee, quoted as an annualized percentage of the loaned value.
• Cash collateral: the lender reinvests the cash and pays the borrower a rebate rate. The lender keeps the difference between what the reinvested cash earns and the rebate.

For a fee-based loan, a common way to express the cost is:

Loan fee = Market value of loaned securities × Annual fee rate × (Days on loan ÷ 360)

The day-count convention is set in the agreement, and 360 is used here as an assumption. Fees depend on supply and demand for the specific security. A large, widely held stock is easy to locate and cheap to borrow. A security with limited lendable supply and heavy short demand becomes “hard to borrow” or “special,” and its fee can be far higher. When the rebate on a cash loan for a special security falls below zero, the borrower is effectively paying the lender for the shares as well as forgoing interest on the cash.

Revenue is then split. A lending agent or broker typically keeps a portion and passes the rest to the beneficial owner. The split is set by the program, not by the market.

Worked Example: A Fee-Based Stock Loan

Hypothetical figures for illustration only.

A pension fund lends 10,000 shares of a stock trading at $40, so the loan’s market value is $400,000. The borrower posts Treasury securities as collateral at 102%:

• Collateral required: $400,000 × 1.02 = $408,000
• Agreed annual fee: 0.50%
• Loan outstanding: 30 days

Fee = $400,000 × 0.005 × (30 ÷ 360) = $166.67

If the lending agent keeps 20% of the revenue, the pension fund receives about $133.33.

Now suppose the stock rises to $44 midway through the loan. The loan is now worth $440,000, so the 102% requirement becomes $448,800 and the borrower must post an extra $40,800 in collateral. If the stock were in heavy short demand, the same loan might carry a fee several times higher.

Why Borrowers Need Securities

Short selling. Securities lending supplies the shares behind most short sales. A short seller borrows shares, sells them immediately and hopes to buy them back later at a lower price. The borrower owes the loan fee whether the trade makes or loses money.

Hypothetical short sale: a trader borrows 50 shares of a $100 stock and sells them for $5,000. If the price drops to $75, buying back costs $3,750 and the trader keeps $1,250 before borrowing fees and any substitute dividends paid. If it rises to $120, buying back costs $6,000, a $1,000 loss plus costs. Because a price can keep rising, losses on a short sale have no fixed ceiling.

Settlement. A broker that must deliver securities it does not yet have, because of a failed or delayed trade, can borrow them to settle on time.

Hedging and arbitrage. Investors holding convertible bonds, options or index positions often short the related stock to offset risk. Arbitrage strategies that profit from price gaps between related instruments also depend on borrowed shares.

Market making. Dealers quoting both sides of a market sometimes sell more than they hold and borrow to cover the gap, which helps keep trading continuous.

By adding supply to the trading pool, lending can support liquidity. When too few shares are available, bid/ask spreads can widen and trades become harder to complete.

Dividends, Voting Rights and Taxes

During a loan, the rights attached to the shares travel with title. The borrower, or whoever bought the shares from a short seller, is the holder of record, so:

• Dividends are paid by the company to the current holder. The borrower then sends the lender a substitute payment (also called a manufactured dividend or payment in lieu) equal to the dividend. The lender receives the cash but not the dividend itself.
• Voting rights pass to the borrower. A lender that wants to vote on a merger or board election has to recall the shares before the record date.
• Other distributions such as rights offerings are handled under the agreement.

The tax treatment can differ from owning the shares outright. In the U.S., substitute payments generally do not qualify for the lower tax rate on qualified dividends and are taxed as ordinary income. Cross-border lending adds withholding-tax questions.

Fully Paid Securities Lending for Individual Investors

Retail investors can participate through fully paid lending programs offered by many brokerages. Shares that are paid for in full, not bought on margin, are lent out by the broker, and the investor receives a share of the lending income, usually as interest calculated while the shares are on loan. Income tends to come mainly from hard-to-borrow stocks. A portfolio of large, easy-to-borrow holdings may earn very little.

This differs from what happens in a margin account. A margin agreement typically allows the broker to lend or pledge customer securities that secure a margin loan, and the customer is generally not paid for it. A fully paid program requires separate consent.

Points to understand before enrolling:

• Collateral: the broker normally posts collateral for the loan, often cash or Treasuries held for the customer’s benefit.
• SIPC coverage: securities on loan may not be protected by SIPC in the way a held position is, and brokers must disclose this. The collateral is the main protection.
• Selling and recall: the investor can usually sell loaned shares at any time, and the broker handles the recall. Enrollment can typically be ended.

Funds work similarly: many mutual funds and ETFs lend portfolio securities and return part of the revenue to the fund, which can offset expenses.

Central Banks and Securities Lending

Central banks lend securities to keep government bond markets functioning. The Federal Reserve Bank of New York lends U.S. Treasury and agency debt from the System Open Market Account to primary dealers. It runs auctions each business day and allocates loans to the best bids, with higher loan-fee bids receiving priority, subject to program limits and the Fed’s discretion. The aim is to ease settlement of Treasury securities that dealers cannot readily find elsewhere, supporting the implementation of monetary policy.

The Eurosystem has lent bonds bought under its public sector purchase program since 2015. Because large-scale purchases under the asset purchase programs removed many bonds from circulation, lending some of them back helps maintain liquidity in bond and repo markets.

Benefits and Risks

Benefits

• Extra income on securities the lender intends to hold anyway, without selling them.
• More shares available for short selling, hedging and settlement, which supports price discovery and liquidity.
• For funds, lending revenue can reduce the net cost of ownership.

Risks

• Borrower default: if the borrower fails to return the shares, the lender uses the collateral to buy replacements. If the price has jumped faster than collateral was topped up, there can be a shortfall that must be pursued legally or absorbed.
• Cash collateral reinvestment risk: when cash is reinvested in instruments that lose value or become illiquid, the lender still owes the full rebate and principal to the borrower. This risk sits with the lender.
• Operational risk: missed recalls, corporate actions or substitute payments.
• Lost rights and tax cost: forgone votes and ordinary-income treatment on substitute payments.

Lending enables short selling, but it does not by itself push prices down. Shorting adds selling pressure only when borrowers act on a negative view, and the same shares must later be bought back.

Securities Lending vs. Related Terms

In a pledge, shares are collateral for borrowing money. In a securities loan, the shares are what the counterparty wants. Lending, repo and margin lending together fall under the broader category of securities financing transactions.

Regulatory Scrutiny of Retail Programs

Fully paid lending has drawn enforcement attention. In December 2023, FINRA ordered four firms (M1 Finance, Open to the Public Investing, SoFi and SogoTrade) to pay a combined $2.6 million, made up of $1.6 million in fines and more than $1 million in restitution to customers. FINRA alleged that the firms lacked adequate supervisory systems for their programs, did not determine whether enrollment was appropriate for individual customers, and failed to compensate customers properly for borrowed securities.

The Bottom Line

Securities lending matters to pension funds, mutual funds, ETFs and retail investors weighing a broker's fully paid lending program. It can add income on shares held anyway, mostly from hard-to-borrow stocks, while the lender keeps price exposure. Before lending, owners should weigh borrower default, reinvestment risk on cash collateral, lost voting rights, limited SIPC coverage and ordinary-income tax on substitute payments.