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Know what you actually own

VTI and VOO look similar on the surface. One holds 3,600 stocks; the other holds 500. That difference matters. We explain what's inside the funds you're considering before you buy them.

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Fees that look tiny aren't

A 1% expense ratio on a $50,000 portfolio quietly costs you around $30,000 over 20 years compared to a 0.03% fund. You'll never see a single line-item charge. Our fee calculator makes it visible.

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Compare funds before you commit

QQQ vs. VGT. IVV vs. SPY. These are genuinely different bets, even when they track similar indexes. We break down what separates them so you can make the call yourself.

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A strategy beats a portfolio of guesses

Three funds, properly allocated, have outperformed most active portfolios over the long run. We cover the three-fund approach, asset allocation, rebalancing, and tax efficiency. Plain English, not textbook language.

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Eye-Opening

Fee Calculator

A 1% expense ratio on $50,000 costs ~$30,000 more than a 0.03% fund over 20 years. See exactly what your ETFs are really costing you.

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ETF Comparison Tool

SPY vs. IVV vs. VOO: same index, different costs and structures. This tool shows you the differences that actually matter, side-by-side.

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ETF Archetype Quiz

Start here if you're new. 5 questions that match you to an investing style: growth, income, stability, or all-market, then recommend specific ETFs for that approach.

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Filter 400+ ETFs by expense ratio, category, and strategy. Good for when you know roughly what you want but haven't settled on a specific fund.

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Check your ETF portfolio for overlap, hidden fees, and concentration risk. See exactly what you own across funds.

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Investor Profiler

Already know your style? Input your time horizon, risk tolerance, and goals to get a specific allocation breakdown: how much in stocks, bonds, and international.

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From the ETF BFF Blog

Short reads on the questions new investors actually have.

Beginner Investing May 27, 2026

The Minimum to Invest in ETFs Is $1. Here's How It Actually Works.

Fractional shares changed the starting line. Most major brokerages now let you put in exactly what you have and buy proportionally into a fund.

Read post →
Beginner Investing May 25, 2026

You Have $500. Here's What to Actually Do With It.

$500 is enough to start. Most investing content won't tell you that. Here's the honest math and what the fund options actually look like.

Read post →
Fees & Costs May 23, 2026

The 0.06% That Could Cost You $203,000

Your expense ratio doesn't show up on your statement. Here's what that small percentage actually does to your returns over 30 years.

Read post →
See all posts →

Free ETF Guides, Clear and Jargon-Free

In-depth ETF investing guides written for real people: clear, opinionated, and jargon-free.

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Beginner

ETF Basics: Your Complete Guide

What are ETFs? How do they work? Start here if you're brand new to exchange-traded funds.

Start with ETF Basics →
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Strategy

Build a 3-Fund Portfolio

The simple, proven strategy for long-term wealth using just three ETFs, and why it outperforms most active approaches.

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Advanced

Understanding Expense Ratios

A 1% fee sounds small. Over 30 years it can quietly consume a quarter of your wealth. Here's the math.

See the Fee Math →
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ETF Investing FAQs: Beginner Questions, Answered Plainly

The questions every beginner asks about ETF investing, answered in plain English.

An ETF (Exchange-Traded Fund) is like a basket of investments—stocks, bonds, or other assets—that you can buy and sell on the stock market just like a single stock. Instead of picking individual companies, you buy a piece of an entire collection, giving you instant diversification. Think of it as buying the whole fruit basket instead of individual apples and oranges.
For broad-market index ETFs, anything above 0.20% is worth questioning. The best US index ETFs (VTI, VOO, FSKAX) charge 0.03% or less. Actively managed ETFs often charge 0.50–1.00%, which needs to be justified by consistent outperformance. Most fail to deliver that over long periods. A useful rule: if the expense ratio is higher than 0.50% and the fund isn't doing something genuinely specialized, look for a cheaper alternative. Use our fee calculator to see what that difference costs you over time.
For long-term buy-and-hold investors, VOO is typically the better choice. Both track the S&P 500 identically, but VOO charges 0.03% versus SPY's 0.0945%. That difference compounds meaningfully over decades. SPY's main advantage is superior liquidity for active traders who need tight bid-ask spreads and high volume. If you're investing for retirement and not trading frequently, VOO or IVV will save you money over time. See the full SPY vs VOO comparison →
For most beginners, a single broad-market index ETF (one that tracks the total U.S. stock market or the S&P 500) is an excellent starting point. Look for a low expense ratio (under 0.10%), high assets under management (over $1 billion is a good sign of stability), and an index you understand. From there, you can add international exposure and bonds as your confidence grows. Our ETF basics guide walks you through the whole process, step by step.
All investing carries risk, ETFs included, and your balance will go up and down with the market. That said, broad index ETFs are widely considered one of the lowest-risk entry points into the stock market because they're diversified by design. Rather than betting on one company, you own a slice of hundreds or thousands. The biggest risk for most beginners is panic-selling during a downturn. Understanding what you own (and why) is the best protection against that.
See all ETF FAQs →
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