U.S. Investing Market Statistics 2026: ETFs, Mutual Funds, and Brokerage Assets
U.S. mutual fund + ETF assets (ICI-style aggregate, ballpark)
~$40 trillion
Source: Investment Company Institute — 2025 Investment Company Fact Book (2025)Last updated 2026-04-01 · Investment Company Institute — 2025 Investment Company Fact Book
What this means for you
Costs compressed for broad index funds — compare expense ratios and tax placement (IRA vs taxable).
Brokerage 'gamification' aside, most wealth accrues from time in market and consistent contributions.
What the Data Says You Should Do
Low-cost brokers and robo-advisors make diversified investing accessible — compare fees and account types.
Online brokers
Low-cost trades and broad funds
Expense ratios and account fees compound over decades.
ETF builder
Backtest a simple allocation
See how mixes behaved historically — not a forecast.
IRAs
Tax-advantaged accounts first
Roth vs traditional depends on income and horizon.
FAQ
How big is the ETF market in the U.S.?
ICI publishes annual fund industry sizing including ETF and mutual fund assets under management.
What percentage of Americans invest in stocks?
Survey estimates vary by methodology; multiple sources suggest a majority of households have some equity exposure, often via retirement plans.
Sources
For general guidance only — individual results vary. Not financial, legal, or tax advice.