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Unit Investment Trust (UIT)

U.S. registered investment company structure with a fixed portfolio and defined trust life rather than ongoing active management.

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A unit investment trust (UIT) is a U.S. registered investment company structure with a fixed portfolio and defined trust life rather than ongoing active management.

It matters because a UIT looks like a pooled fund, but it does not operate like a conventional actively managed mutual fund. Its fixed portfolio and trust mechanics create a different investor experience.

How It Works

A UIT generally:

  • starts with a predefined portfolio of securities
  • keeps that portfolio largely fixed rather than actively trading it
  • offers redeemable units to investors
  • terminates on a stated schedule or trust end date

Why It Matters

The structure changes expectations around turnover, management discretion, cost, and predictability. Investors who hear trust, fund, and pool used loosely can miss those practical differences.

Revised on Monday, May 18, 2026