SIE Cheat Sheet

The SIE formulas and numbers worth memorizing, each with a worked example and the rule or regulator it comes from, updated for 2026 changes.

Updated 2026-09-23 · 12 sources · By the SeriesPrepKit team

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

Rules change. Figures verified 2026-09-23; FINRA and NASAA update exam content on their own schedule after a rule change, so check each exam page before your test.
ItemNumber / ruleSource
Settlement, regular wayT+1 for most securities (since May 28, 2024)

SEC

Currency Transaction ReportCash over $10,000 in a day

FinCEN

Broker-dealer SAR threshold$5,000 in suspicious activity

FinCEN

SIPC protectionUp to $500,000 per customer, including a $250,000 limit for cash

SIPC

Reg T initial margin50% of purchase price

Federal Reserve Regulation T (12 CFR Part 220)

FINRA minimum margin equity$2,000 to open (FINRA Rule 4210)

FINRA Rule 4210

Rule 144 holding period6 months (reporting issuer) or 1 year (non-reporting) for restricted stock

SEC Rule 144 (17 CFR 230.144)

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

SEC Rule 501

FINRA gift limit$300 per person per year (raised from $100, effective March 30, 2026)

FINRA Regulatory Notice 26-05

2026 IRA contribution limit$7,500 ($1,100 catch-up at 50+)

IRS

SIE validity4 years from passing

FINRA

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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

  1. FINRA - Securities Industry Essentials (SIE) Exam (accessed 2026-09-23)
  2. FinCEN - Currency Transaction Report rule (31 CFR 1010.311) (accessed 2026-09-23)
  3. IRS - 401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500 (accessed 2026-09-23)
  4. SEC Rule 144 (17 CFR 230.144) (accessed 2026-09-23)
  5. FINRA Regulatory Notice 26-05 - Gifts Rule amendments ($300 limit, effective March 30, 2026) (accessed 2026-09-23)
  6. FINRA Rule 4210 - Margin Requirements (accessed 2026-09-23)
  7. SEC Rule 501 - Accredited investor definition (17 CFR 230.501) (accessed 2026-09-23)
  8. Federal Reserve Regulation T (12 CFR Part 220) (accessed 2026-09-23)
  9. FinCEN - SAR rule for broker-dealers (31 CFR 1023.320) (accessed 2026-09-23)
  10. FINRA - SIE Exam and Exam Restructuring FAQ (accessed 2026-09-23)
  11. SIPC - What SIPC Protects (accessed 2026-09-23)
  12. SEC - Shortening the securities settlement cycle to T+1 (compliance date May 28, 2024) (accessed 2026-09-23)