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Index Funds

Index funds are the simplest credible way to invest. They hold what the index holds, charge close to nothing, and over long periods beat most actively managed alternatives.

Why people search for index funds

Track a broad market index at the lowest possible cost and let compounding do the work.

Every listing below is editorially independent — MoneyMoodBoard does not earn commissions on any of them. Numeric fields cite primary sources (regulator filings, operator pricing pages) on the individual listing page.

41 listings as of June 2026

Key attributes for index funds

Expense ratio·Index tracked·Minimum·Type

What to look for in index funds

Use this checklist before committing to any index funds listed above: editorial criteria that consistently separate well-run products from the rest. Each point applies to most listings in the category, including those we have not yet reviewed in detail.

Expense ratio

Total-market US index funds now charge as little as 0.015%. Anything over 0.10% for a vanilla broad-market exposure is uncompetitive. The expense ratio is the single most reliable predictor of long-term outperformance within the index-fund category.

Index methodology

The S&P 500 is not the total US market — it excludes mid- and small-caps and uses a committee-curated selection. A CRSP US Total Market or Russell 3000 index covers more ground. Read the index methodology document before assuming similar-sounding funds are interchangeable.

Tracking error

A well-run index fund tracks within a few basis points of the index after fees. Persistent tracking error well above the expense ratio signals poor execution — costly sampling, slow rebalancing, or securities-lending shortfalls. Compare 3-year tracking against the published benchmark.

Tax efficiency

Index mutual funds rarely distribute capital gains; ETF share classes of the same index generally distribute even less because of the in-kind redemption mechanism. In taxable accounts, prefer the ETF wrapper. In tax-advantaged accounts, either works equally well.

What are index funds?

Index Funds are passive investment funds. The five short sections below walk through how they work, who they suit, the main risks, where they fit in a broader plan, and the US regulatory rules that govern them today.

How index funds work

The fund buys the same securities as a benchmark such as the S&P 500 in the same proportions. Your return mirrors the index minus the fund's small expense ratio.

Who they suit

Pretty much every long-horizon investor. Index funds are the recommended core holding in most personal-finance writing for a reason.

Key risks

You get the entire downside of the index in a bear market. There's no manager trying to soften the fall — diversification across asset classes, not stock picking, is the answer.

Fit in a broader plan

A two- or three-fund portfolio of total US stock, total international stock and total bond market index funds is the backbone of mainstream personal-finance advice. Index funds also dominate workplace plans where they're available. Active satellites, if any, sit around this core — not in place of it.

US regulatory context

Index funds are SEC-registered investment companies. Their expense ratios are disclosed in the prospectus and deducted daily from NAV. The 'index' itself is licensed from a provider (S&P, MSCI, FTSE Russell, CRSP) and methodology changes are publicly documented.

Index Funds glossary

These are the terms you will see most often across index funds listings, statements, prospectuses and support docs. Skim them once so the rest of the page, and every product page in this category, reads cleanly the next time you visit.

Benchmark
The published index the fund aims to replicate.
Tracking error
The standard deviation of the fund's return minus the benchmark's return.
Total market
An index covering essentially every investable US stock, not just the largest names.
Cap-weighted
Holdings sized in proportion to market cap. The default methodology for most major indexes.
Float-adjusted
Cap weighting limited to freely tradable shares, excluding closely held blocks.
Sampling vs. full replication
Some bond index funds approximate the index with a representative sample rather than buying every bond.
Securities lending
The fund lends shares to short sellers for a fee, partially offsetting the expense ratio.
Three-fund portfolio
A Bogleheads-style allocation across total US stock, total international stock and total bond market index funds.

Related listings in other categories

Investors comparing index funds often weigh adjacent categories that solve a similar job from a different angle. The cards below jump to sibling sections of the directory where the same money could plausibly be put to work or compared.

ETFs

Baskets of securities that trade on a stock exchange like a single share.

Mutual Funds

Pooled investment vehicles, most often actively managed, that price once a day at NAV.

Investment Platforms

Robo-advisors and managed portfolios that pick and rebalance investments for you.

Index Funds: common questions

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