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SIE cheat sheetSection 3: Trading, Customer Accounts & Prohibited Activities (31%)

Prohibited Practices & Ethics

Free and printable — use your browser's print function for a clean copy. Updated 2026-07-05.

Insider Trading

  • Trading on Material Nonpublic Information (MNPI)
  • Material: would a reasonable investor consider it important?
  • Nonpublic: not yet disseminated to the general public
  • BOTH the tipper and the tippee can be liable
  • Penalties: Up to 3x profit or loss avoided (civil), criminal penalties up to $5M individual / $25M firm

Front-Running

  • Trading ahead of a customer's large order to profit from the expected price movement
  • Prohibited for all registered persons

Churning (Excessive Trading)

  • Excessive transactions to generate commissions, not for customer benefit
  • Rep controls the account + frequency/size of trades is excessive
  • Indicators: high turnover ratio, cost-to-equity ratio

Market Manipulation

  • Painting the tape: Creating appearance of trading activity with wash trades
  • Marking the close: Placing trades near market close to affect closing price
  • Pump and dump: Artificially inflating price then selling (common in penny stocks)

Free-Riding

  • Buying securities and selling them before paying for them (in a cash account)
  • Result: 90-day freeze on account (must deposit cash before trades)

Breakpoint Selling

  • Selling mutual fund shares just below a breakpoint to deny investor the volume discount
  • A prohibited practice — reps must inform investors of breakpoints

Selling Away

  • Engaging in private securities transactions without firm approval
  • Rep must give written notice to firm BEFORE the transaction

Sharing in Customer Accounts

  • Rep may share in profits/losses ONLY with written firm approval
  • AND must share proportionately to their own financial contribution
  • Exception: immediate family members (proportional sharing not required)

Suitability / Reg BI (Best Interest)

  • Must have reasonable basis to believe recommendation is suitable
  • Reg BI: must act in BEST INTEREST of retail customer
  • Consider: risk tolerance, time horizon, liquidity needs, tax status, investment objectives
  • KYC (Know Your Customer): must gather customer information before recommending

Key facts to memorize

  • Insider trading: trading on MNPI, both tipper/tippee liable
  • Churning: excessive trading for commissions
  • Front-running: trading ahead of customer's order
  • Free-riding: 90-day account freeze
  • Breakpoint selling: must inform investors of volume discounts
  • Selling away: prior written notice to firm required
  • Reg BI: best interest standard for retail customers

Mnemonics that stick

  • "MNPI = Material Nonpublic Information = NEVER trade on it"
  • "Churning = Commissions, not Customer benefit"
  • "Free-riding = Free lunch? 90-day FREEZE on your account"
  • "Selling Away = Selling securities Away from your firm without telling them"
  • "Breakpoint Selling = Breaking the customer's savings by keeping them under the discount"

Exam traps

  • BOTH the tipper AND tippee are liable for insider trading — not just the trader
  • Front-running applies to ALL registered persons, not just traders
  • Free-riding results in a 90-day FREEZE — not account termination
  • Selling away requires PRIOR written notice to the firm (not after)
  • Sharing in accounts requires WRITTEN firm approval AND proportionate sharing
  • Breakpoint selling is about DENYING discounts — reps must inform customers of breakpoints
  • Reg BI applies to RETAIL customers, not institutional

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