Formulas and concepts, with worked examples
Current yield - Annual interest / market price
Example: A 5% bond ($50/year) priced at $1,000 x 0.92 = $920: current yield = 50 / 920 = 5.43%. Price below par, so current yield is above the coupon.
Bond price vs. yield - Price and yield move in opposite directions
Example: Rates rise, existing bond prices fall. A discount bond has YTM > current yield > coupon; a premium bond is the reverse.
Mutual fund sales charge % - (POP - NAV) / POP
Example: NAV $19.00, POP $20.00: sales charge = 1.00 / 20.00 = 5% (always divide by the offering price).
Stock split - New shares = old x ratio; new price = old / ratio
Example: 100 shares at $60 with a 3-for-2 split: 150 shares at $40. Total value unchanged at $6,000.
Long call breakeven - Strike + premium
Example: Buy 1 XYZ 50 call for $3: breakeven $53; max loss $300 (premium x 100 shares).
Numbers and deadlines to memorize
| Item | Number / rule | Source |
|---|---|---|
| Settlement, regular way | T+1 for most securities (since May 28, 2024) | |
| Currency Transaction Report | Cash over $10,000 in a day | |
| Broker-dealer SAR threshold | $5,000 in suspicious activity | |
| SIPC protection | Up to $500,000 per customer, including a $250,000 limit for cash | |
| Reg T initial margin | 50% of purchase price | |
| FINRA minimum margin equity | $2,000 to open (FINRA Rule 4210) | |
| Rule 144 holding period | 6 months (reporting issuer) or 1 year (non-reporting) for restricted stock | |
| Accredited investor (natural person) | $200,000 income ($300,000 joint) in each of the last 2 years, or $1 million net worth excluding primary residence | |
| FINRA gift limit | $300 per person per year (raised from $100, effective March 30, 2026) | |
| 2026 IRA contribution limit | $7,500 ($1,100 catch-up at 50+) | |
| SIE validity | 4 years from passing |
Download this SIE cheat sheet
The formulas, examples and numbers on this page as a printable one-pager (print or save as PDF) or a Word file.
Test yourself: 10 free SIE questions
SIE practice questions
Get the full SIE bank
Outline-weighted original questions with explanations, section drills and timed full-length exams. $79 one-time, 12 months, free access extension until you pass.
Frequently asked questions
Can I bring a cheat sheet into the SIE?
No. Reference materials are not permitted in the testing session; this sheet is for studying only.
Is there a lot of math on the SIE?
Some: yields, sales charges, splits and basic options breakevens.
Sources
- FINRA - Securities Industry Essentials (SIE) Exam (accessed 2026-09-23)
- FinCEN - Currency Transaction Report rule (31 CFR 1010.311) (accessed 2026-09-23)
- IRS - 401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500 (accessed 2026-09-23)
- SEC Rule 144 (17 CFR 230.144) (accessed 2026-09-23)
- FINRA Regulatory Notice 26-05 - Gifts Rule amendments ($300 limit, effective March 30, 2026) (accessed 2026-09-23)
- FINRA Rule 4210 - Margin Requirements (accessed 2026-09-23)
- SEC Rule 501 - Accredited investor definition (17 CFR 230.501) (accessed 2026-09-23)
- Federal Reserve Regulation T (12 CFR Part 220) (accessed 2026-09-23)
- FinCEN - SAR rule for broker-dealers (31 CFR 1023.320) (accessed 2026-09-23)
- FINRA - SIE Exam and Exam Restructuring FAQ (accessed 2026-09-23)
- SIPC - What SIPC Protects (accessed 2026-09-23)
- SEC - Shortening the securities settlement cycle to T+1 (compliance date May 28, 2024) (accessed 2026-09-23)