The Three Options
A quick definition of each
Investors seeking liquidity without selling assets typically consider three main borrowing vehicles. Each uses a different asset as collateral and operates under different regulatory frameworks:
Securities-Backed Line of Credit (SBLOC)
A non-purpose loan secured by your investment portfolio. Governed by Federal Reserve Regulation U (for banks). Proceeds CANNOT be used to purchase securities. Variable rate typically SOFR + 1.5–3%.
Margin Loan
Credit extended by a broker-dealer against your brokerage account. Governed by Regulation T (initial) and FINRA Rule 4210 (maintenance). Proceeds CAN be used to buy more securities. Variable rate varies widely by broker and balance.
Home Equity Line of Credit (HELOC)
A revolving credit line secured by equity in your home. Governed by consumer lending regulations. Proceeds can be used for any purpose. Variable rate typically Prime + 0–2%. Requires home appraisal and underwriting.
Full Comparison
Every key factor compared
| Feature | SBLOC | Margin Loan |
|---|---|---|
| Collateral | Investment portfolio | Brokerage account securities |
| Regulation | Fed Reg U (banks) | Fed Reg T + FINRA 4210 |
| Max initial LTV | 50–80% (varies by asset) | 50% (Reg T limit for equities) |
| Can buy securities? | NO (non-purpose loan) | YES — primary purpose |
| Typical rate (2026) | 5.0–6.7% | 6.5–12%+ (retail); 5.5–7% ($1M+) |
| Rate benchmark | SOFR + spread | Broker base rate or SOFR |
| Margin call timing | 3–5 days typical cure period | Can be immediate; no notice required |
| Maintenance requirement | 30–50% (varies by lender) | 25% FINRA minimum; 30–40% house req. |
| Tax deductibility | Depends on use of proceeds | Investment interest (limited) |
| Setup process | Application with bank/lender | Enable margin in brokerage account |
| Best for | Personal liquidity needs | Buying more investments on leverage |
| Feature | HELOC |
|---|---|
| Collateral | Home equity |
| Regulation | Consumer lending (TILA, RESPA) |
| Max LTV | 80–90% of home value minus mortgage |
| Can buy securities? | Yes — no use restrictions |
| Typical rate (2026) | 7.5–9.5% |
| Rate benchmark | Prime rate + margin |
| Margin call? | No margin calls — fixed collateral value |
| Risk if market falls | None to HELOC (home not sold) |
| Tax deductibility | Only if used for home improvement |
| Setup process | Appraisal, underwriting, 2–6 weeks |
| Best for | Any purpose; no margin-call risk |
Rate Comparison
What each option costs in 2026
Interest rates are the most tangible cost difference. Here's what a $500,000 borrow looks like across each product:
| Product | Annual Cost on $500K (2026) |
|---|---|
| SBLOC ($1M+ portfolio) | $25,000–$32,500 (5.0–6.5%) |
| Margin loan (retail, $500K balance) | $35,000–$45,000 (7–9%) |
| Margin loan (institutional, $1M+ balance) | $27,500–$35,000 (5.5–7%) |
| HELOC | $37,500–$47,500 (7.5–9.5%) |
| Personal loan (unsecured) | $40,000–$75,000 (8–15%) |
For large portfolios ($1M+), securities-backed credit lines consistently offer the lowest rates. The spread advantage widens with portfolio size — ultra-HNW clients may pay SOFR + 1% or less. However, rate advantage must be weighed against the unique risk of margin calls that HELOCs do not carry.
Risk Comparison
The critical risk differences most people miss
The most important difference between these three options isn't the interest rate — it's the risk of losing your collateral involuntarily:
HELOC Advantage: No Margin Calls
- Home value doesn't trigger repayment demands
- No daily monitoring of collateral
- Lender cannot force sale of your home over market declines
- Fixed collateral value — irrelevant of stock market
- Draw period typically 5–10 years with predictable payments
SBLOC/Margin Risk: Forced Liquidation
- Portfolio decline triggers margin/maintenance calls
- Lender can sell your securities without notice (FINRA)
- Forced sale triggers capital gains taxes at worst time
- Variable rates can spike during market stress
- Double risk: collateral falls while cost rises
This is why some financial advisors recommend HELOCs over SBLOCs despite the higher interest rate. A HELOC costs 2–3% more per year in interest — but it cannot force you to sell appreciated stock at the bottom of a market crash. The insurance value of that protection is worth far more than the rate difference for many investors.
Margin Loans Are the Riskiest: Margin loans combine the highest rates (for retail accounts), the tightest maintenance requirements (25% FINRA minimum), the fastest liquidation timeline (no notice required), and the ability to use proceeds for speculative purposes. This creates compounding leverage risk that has destroyed portfolios during every market correction.
The Embark Strategy
Diversify Without Selling Your Stock
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Use of Proceeds
What you can (and cannot) do with the money
A major regulatory distinction that most investors don't understand:
| Use of Proceeds | SBLOC → Margin → HELOC |
|---|---|
| Buy more stocks/ETFs | ❌ Prohibited → ✅ Primary purpose → ✅ Allowed |
| Home down payment | ✅ Allowed → ✅ Allowed → ✅ Allowed |
| Business expenses | ✅ Allowed → ✅ Allowed → ✅ Allowed |
| Tax payments | ✅ Allowed → ✅ Allowed → ✅ Allowed |
| Lifestyle/consumption | ✅ Allowed → ✅ Allowed → ✅ Allowed |
| Crypto purchase | ❌ Prohibited → ❌ Usually prohibited → ✅ Allowed |
| Angel investing | ⚠️ Gray area → ⚠️ Gray area → ✅ Allowed |
SBLOCs are classified as "non-purpose" loans under Regulation U. You must sign a Purpose Statement (Form U-1) certifying that proceeds will not be used to purchase or carry margin securities. Violating this restriction can result in the loan being called immediately and potential regulatory consequences.
If your goal is to buy more investments, a margin loan is the correct (and only legal) vehicle. If your goal is personal liquidity — home purchase, tax payment, business funding — an SBLOC or HELOC is appropriate.
Decision Framework
Which option fits your situation
Choose SBLOC If...
You have a $500K+ portfolio, need personal liquidity (not for buying securities), want the lowest rate, can tolerate margin-call risk, and plan to repay within 1–3 years.
Choose Margin Loan If...
You specifically want to buy more securities on leverage, understand the amplified risk, and are an experienced investor comfortable with Reg T requirements.
Choose HELOC If...
You have substantial home equity, want zero margin-call risk, need flexibility on how funds are used, and can accept a slightly higher interest rate for the peace of mind of fixed collateral.
Consider Not Borrowing If...
Your primary goal is ongoing income (not a one-time lump sum), you hold concentrated stock, and you'd prefer to generate yield rather than take on debt and interest expense.
Beyond Borrowing
When income replaces the need to borrow
All three borrowing options share a fundamental limitation: they cost you money. You pay interest while your stock sits idle (generating no income). The question worth asking: what if your stock generated income itself?
The Embark Approach
10%+ Targeted Annual Income
Your stock works for you instead of sitting as idle collateral
No Interest Expense
You're generating income, not paying it out to a lender
No Margin Calls
No debt means no collateral requirements, no forced liquidation
Tax-Deferred Entry
§721 contribution is not a taxable sale — same tax benefit as borrowing
Embark's §721 SPV transforms concentrated stock from idle collateral into an income-generating asset. For investors whose underlying need is cash flow (not a one-time lump sum), generating 10%+ annual income from the position eliminates the need to borrow — while avoiding the taxes of selling and the risks of leverage.
FAQ
Comparison questions answered
Is a securities-backed loan the same as margin?
No. A margin loan is governed by Regulation T and can be used to buy securities. A securities-backed line of credit (SBLOC) is a non-purpose loan governed by Regulation U — proceeds cannot be used to buy or carry securities. They have different regulations, use cases, rates, and risk profiles.
Should I use a HELOC or borrow against my portfolio?
HELOCs cost 2–3% more in interest but carry zero margin-call risk. If you hold concentrated stock and are concerned about forced liquidation during a market downturn, a HELOC may be safer despite the higher rate. If you have a large, diversified portfolio and borrow conservatively, an SBLOC may save money.
Which has better rates?
For portfolios over $1 million, SBLOCs typically offer the best rates (5.0–6.5%). Margin loans vary widely — institutional rates compete with SBLOCs, but retail rates (6.5–12%) are often worse. HELOCs (7.5–9.5%) are the most expensive of the three.
Is a margin loan riskier?
Yes, for two reasons: (1) proceeds are typically used to buy more securities, creating layered leverage, and (2) FINRA maintenance requirements allow brokers to liquidate without notice. An SBLOC at least restricts proceeds to non-securities uses, limiting leverage compounding.
What is the best way to get liquidity from appreciated stock?
It depends on whether you need a one-time sum or ongoing cash flow. For one-time needs: SBLOC (lowest rate) or HELOC (no margin risk). For ongoing income: structures that generate yield from the position (like Embark's §721 SPV) may be more efficient than perpetual borrowing.
Securities-Backed Lending Series
6 of 8
Income, Not Debt
What If You Didn't Need to Borrow?
Every borrowing option charges interest and creates risk. Embark's §721 SPV generates income from your concentrated stock — 10%+ targeted annual yield with no debt, no margin calls, and no capital gains trigger. Income replaces borrowing.