Updated June 16, 2026
Quick answer
Securities-based lending pledges your stocks, ETFs, mutual funds, or investment-grade bonds as collateral to open a credit facility — typically a revolving, interest-only, variable-rate line. Lenders advance 50-75% LTV on eligible portfolio value, scaled by diversification, liquidity, and volatility. A $1M diversified portfolio at 60% LTV supports about $600K of available credit. Unlike margin loans, SBL allows broader business and liquidity uses. Lenders monitor portfolio value continuously; significant declines trigger paydowns or additional collateral.
How Does Securities-Based Lending Work?
Instead of selling securities for immediate cash, SBL creates a collateral-backed borrowing facility tied to portfolio value and risk profile.
Step 1: Portfolio Evaluation
Lenders review the investment portfolio and quality of pledged holdings, often including:
- Publicly traded stocks
- Bonds
- ETFs
- Mutual funds
- Investment-grade securities
They also assess diversification, liquidity, volatility, and concentration risk. Highly diversified portfolios usually receive stronger advance rates.
Step 2: Determine Loan-to-Value (LTV)
Once collateral is reviewed, the lender sets a borrowing limit. Typical advance rates often range from 50% to 75% of eligible portfolio value depending on risk profile.
Example: A $1,000,000 portfolio at 60% LTV may support up to $600,000 in available credit.
Step 3: Establish Credit Facility
Most SBL facilities are structured as:
- Revolving lines of credit
- Interest-only facilities
- Variable-rate structures
Borrowers can draw funds as needed up to the approved limit. Repayment structure is typically flexible.
Step 4: Ongoing Portfolio Monitoring
Because the portfolio secures the facility, lenders monitor:
- Asset concentration
- Volatility
- Market value changes
If collateral value declines significantly, borrowers may need to post additional collateral or pay down part of the balance.
How Is Securities-Based Lending Different from Margin Loans?
| Feature | Securities-Based Lending | Margin Loan |
|---|---|---|
| Use of Funds | Broader business/liquidity use | Typically investment-only |
| Structure | Customized credit facility | Brokerage-account margin |
| Monitoring | Structured lender oversight | Brokerage-driven |
What Can Securities-Based Loans Be Used For?
- Business expansion and operations
- Real estate acquisition deposits
- Bridge financing
- Working capital
- Tax strategy and timing liquidity needs
Minimum Loan Amount
Securities-based lending facilities typically start at $10,000, then scale based on portfolio value, collateral quality, and lender policy.
A Worked Example: A $1M Portfolio Line in Practice
Say you hold a $1,000,000 diversified portfolio of blue-chip stocks, ETFs, and investment-grade bonds. A lender approves a 60% LTV facility, giving you up to $600,000 of revolving credit. You draw $300,000 to fund a business opportunity, leaving $300,000 of unused headroom. Because the line is interest-only and variable, you pay interest only on the $300,000 drawn — not the full limit — and you repay on your own schedule, redrawing later if needed. Critically, your shares are never sold: they stay invested, keep compounding, and keep paying dividends while they collateralize the line. That is the whole appeal — liquidity without a taxable sale or giving up your market position. The figures are illustrative, not a quote; your actual LTV, rate, and limit depend on your specific holdings.
What a Collateral Call Actually Means
The trade-off for that flexibility is collateral risk. Because the loan is secured by a portfolio whose value moves daily, the lender tracks your loan-to-value continuously. If the market falls and your portfolio drops enough that the LTV climbs past the approved threshold, the lender can issue a collateral call: you will need to add collateral, pay down the balance, or — if you cannot — the lender may sell securities to bring the line back in line, possibly at a bad time and with tax consequences. This is why experienced borrowers draw well below the maximum. Borrowing $300,000 against a $600,000 limit means your portfolio can fall substantially before the threshold is even approached; borrowing the full $600,000 leaves almost no cushion. Treating the limit as a ceiling to stay far under — not a target to hit — is the single most important habit in using SBL safely.
Final Thoughts
SBL can provide flexible liquidity while preserving long-term investment positioning. When structured conservatively, it can be an effective strategy for businesses that need capital without forced asset sales. Explore current securities-based lending options before choosing a facility structure.
Sources & Further Reading
- FINRA: Securities-Backed Lines of Credit Explained — FINRA's guidance on SBLOCs, including maintenance requirements and what happens when collateral falls.
Rate, fee, and policy figures cited above reflect current published guidance as of the article publication date. Always confirm current figures with the cited source or your lender before acting on financing decisions.
Frequently Asked Questions
How does securities-based lending work?
You pledge stocks, ETFs, mutual funds, or investment-grade bonds as collateral to open a credit facility, typically a revolving, interest-only, variable-rate line. Lenders advance 50-75% LTV on eligible portfolio value.
How much can you borrow with securities-based lending?
Lenders advance 50-75% LTV scaled by diversification, liquidity, and volatility. A $1M diversified portfolio at 60% LTV supports about $600K of available credit.
How is securities-based lending different from a margin loan?
Unlike margin loans, securities-based lending allows broader business and liquidity uses, not just buying more securities, and is structured as a flexible revolving line.
Do lenders monitor your portfolio?
Yes. Lenders monitor portfolio value and can issue a collateral call if the loan-to-value rises above approved thresholds.