Research
Alternatives to a Margin Loan
A current USD margin schedule set against the October 6, 2026 1-year Haven SPX Box Rate. There is no public history of that schedule.
Key takeaway
On October 6, 2026 the 1-year Haven SPX Box Rate was 4.88%. A USD margin schedule checked October 8 started at 5.38% on the first $100,000. There is no public history of that schedule.
Current comparison
Haven SPX Box RateIBKR Pro USD schedule, October 8, 2026
Hover a bar for the rate.
| Balance | Rate | Versus the October 6 Haven SPX Box Rate |
|---|---|---|
| 1-year Haven SPX Box Rate, October 6, 2026 | 4.88% | — |
| IBKR Pro USD, up to $100,000 | 5.38% | 0.50 pp higher |
| IBKR Pro USD, $100,000 to $1,000,000 | 4.88% | In line |
| IBKR Pro USD, $1,000,000 to $50,000,000 | 4.63% | 0.25 pp lower |
| IBKR Pro USD, $50,000,000 to $250,000,000 | 4.38% | 0.50 pp lower |
| $300,000 blended on the tiers above | 5.05% | 0.17 pp higher |
Schedule checked October 8, 2026. A $300,000 balance blends to 5.05%. IBKR Lite was 6.38% at every listed tier. Introduced clients may pay a different rate.
What this means
This page is the current posted schedule, not a historical margin series. The line on the margin comparison page is only the Haven SPX Box Rate back to 2012. A margin debit can change with the broker schedule; the Haven SPX Box Rate is a reference rate, not that debit.
Sources: Box Spread Financing vs. Margin Loans · Interactive Brokers margin rates · Alternatives to an SBLOC · Methodology.
Haven Funding LLC is owned by Haven Systems LLC. Neither firm is a bank or a registered broker-dealer. Securities and execution services are provided through Interactive Brokers LLC. The Haven SPX Box Rate is a constant-maturity reference rate. It is not a Truth in Lending APR and not a commitment to lend.