Browse FINRA SIE & Series Exam Guides

Investment Company Basics

Open-end funds, closed-end funds, and UIT structures relevant to Series 6 product coverage.

This section gives the structural vocabulary for the rest of Chapter 4. Before a candidate can reason through pricing, suitability, or customer disclosures, the candidate needs to know what kind of investment company is in the fact pattern and how that structure affects ownership, pricing, and market behavior.

High-Yield Structural Distinctions

Product typeCore structurePricing behaviorExam-useful clue
open-end fundcontinuously issues and redeems sharesbought and redeemed at NAV-related pricingmutual fund language, sales charges, share classes
closed-end fundfixed share issuance after offeringtrades in the market at premium or discount to NAVexchange-traded fund shares with market pricing
UITfixed portfolio with limited active managementsold as redeemable unitstrust language, fixed basket, little portfolio turnover

Series 6 often turns this into a recognition problem. If the shares trade on an exchange, the product is not behaving like an open-end mutual fund. If the portfolio is essentially fixed and trust-based, the product is moving toward UIT logic rather than active fund-management logic.

Key Takeaways

  • Structure drives pricing behavior.
  • Closed-end funds and UITs matter on Series 6 because they sharpen comparisons with mutual funds.
  • The strongest answer usually starts by naming the product structure correctly.

In this section

Revised on Thursday, April 23, 2026