ETF BFF Blog

Office hours for ETF investors.

Real talk about ETFs — CFA® Charterholder reviewed. Fees, portfolio decisions, fund comparisons, and the calls most investors get wrong.

Reviewed by a CFA® Charterholder
Updated regularly
Latest Post
Fund Mechanics · August 27, 2026 · 7 min read

Nvidia Jumped 8.7%. SMH Got 1.9 Points of It. SOXX Got 0.8.

SMH holds Nvidia at 21.70% of the fund. SOXX holds it at 9.05%. Same sector label, same 0.35% expense ratio, and one fund carries more than twice the Nvidia of the other. The weight is the whole story, and it works exactly as hard in reverse.

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CFA® Charterholder · ETF BFF
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More Posts
Fund Mechanics
A Biotech Stock Doubles. XBI Moves About 0.7%.
XBI equal-weights roughly 150 biotech companies, so the largest single-name move in the sector is worth about two thirds of one percent to the fund. IBB weights by market cap and XLV is only partly biotech at all. Three funds, one sector label, three different machines underneath.
August 19, 2026 · 7 min read Read →
Fund Mechanics
32 NHL Team ETFs Were Just Filed. The Index Resets to 7,500 Every Season.
Volatility Shares filed on August 14 to register one ETF for every NHL team, each holding futures on a team performance index built from 55 statistics. That index starts each season at 7,500 and returns to 7,500 when the postseason ends, so it never accumulates. Fees and tickers are still blank.
August 15, 2026 · 8 min read Read →
Taxes & Accounts
Box-Spread ETFs: Cash That Defers the Tax Bill
BOXX holds no Treasuries and pays no interest, so the return lands in the share price and the tax waits until you sell. The mechanics are real. So is Section 1258, the part of the tax code written for exactly this kind of arrangement, which has never been applied to it.
August 14, 2026 · 8 min read Read →
Cash & Bonds
SGOV vs High-Yield Savings: Which Holds Cash Better?
A bank chooses what your savings account pays and can change it any day. SGOV pays whatever Treasury bills pay, minus 0.09%. The other split is FDIC insurance against a state tax exemption worth $133 a year on $25,000 in California, and nothing at all in Texas.
August 14, 2026 · 7 min read Read →
Fund Mechanics
Return of Capital: How to Tell If a Fund Is Paying You Income or Your Own Money Back
A fund can advertise a 66% distribution rate and classify 97% of the payment as return of capital, which means most of the cash is your own principal coming back. The label itself is neutral. What it tells you depends entirely on what the share price did while you were collecting.
August 3, 2026 · 7 min read Read →
Beginner Investing
When Do ETFs Pay Dividends? The Calendar, the Four Dates, and the Free Money That Isn't
Most stock ETFs pay quarterly in March, June, September, and December. Bond and covered call funds pay monthly. Four dates decide who gets the cash, and buying the day before the cutoff gets you nothing.
July 25, 2026 · 6 min read Read →
Fund Mechanics
SEC Yield vs Distribution Yield: Why Your Fund Shows Three Different Numbers
The same fund page can quote a 30-day SEC yield, a distribution yield, and a trailing 12-month yield, and they can disagree by several percentage points. Only one of them is standardized. What each number measures and which to trust for which kind of fund.
July 22, 2026 · 6 min read Read →
Taxes & Accounts
The Wash Sale Rule and ETFs: What "Substantially Identical" Actually Means
Sell an ETF at a loss and buy it back within 30 days, and the IRS disallows the loss. The rule is a century old, the IRS has never defined "substantially identical" for funds, and the expensive mistakes happen in accounts your broker never checks.
July 19, 2026 · 7 min read Read →
Taxes & Accounts
Is SGOV Exempt From State Tax? The State-by-State Breakdown
SGOV holds only US Treasury bills, and Treasury interest is exempt from state and local income tax under federal law. Which states that matters in, which nine states it doesn't, and how the exemption actually shows up on your return.
July 15, 2026 · 7 min read Read →
Market Mechanics
SK Hynix Raised $26.5 Billion on the Nasdaq. ETF Investors Already Owned It.
SK Hynix listed ADRs on the Nasdaq on July 10, the largest US share sale ever by a foreign company. If you already hold DRAM or EWY, you had exposure to this before the ticker SKHY existed.
July 14, 2026 · 6 min read Read →
Fund Mechanics
FXAIX vs VOO: Same S&P 500, and Fidelity's Fund Is Actually Cheaper
VOO gets the fee-conscious reputation, but Fidelity's own S&P 500 fund undercuts it. Same index, same 500 companies, and a real difference in how each one trades, taxes, and settles.
July 14, 2026 · 6 min read Read →
ETF Culture
The Home Run Derby Is in Philly. Every Slugger Has an ETF Twin.
Bryce Harper and Kyle Schwarber get to swing for the fences in the building they play 81 games a year in. The 2026 Home Run Derby and All-Star Game field, translated into ETFs, and what home-field advantage actually teaches you about your portfolio.
July 13, 2026 · 6 min read Read →
ETF Culture
The World Cup Portfolio: Every Contender Has an ETF
The 2026 World Cup is co-hosted by the US, Canada, and Mexico, and almost every contender is a single-country ETF you can own. The full bracket in tickers, and the one lesson soccer teaches about investing abroad.
July 3, 2026 · 6 min read Read →
Market Recap
Q2 2026 ETF Report Card: What Worked, What Didn't
The second quarter ended with tech winning again, bonds doing their job quietly, and a few familiar names surprising in both directions. Here's what the numbers actually looked like across the major ETF categories.
June 25, 2026 · 5 min read Read →
Fund Analysis
QTUM Is Up 79% This Year. Here's What's Actually Driving It.
The Defiance Quantum ETF holds $5.7 billion, returned 79% over the past year, and has become one of 2026's more talked-about thematic funds. Most investors assume it means quantum computing is paying off. It mostly doesn't. Not yet. Here's what's actually in the fund.
June 25, 2026 · 6 min read Read →
Investing Strategy
Investing in a Down Market: What ETFs Do Right
The S&P 500 has declined 20% or more nine times since 1950. It has recovered from all nine. What separates investors who captured those recoveries from the ones who did not is not skill. It is structure.
June 23, 2026 · 8 min read Read →
Taxes & Accounts
SCHD vs VYM vs JEPI in a Taxable Account: Tax Efficiency Ranked
JEPI pays 8.5% and SCHD pays 3.5%. After federal taxes in the 22% bracket, JEPI nets roughly 6.7% and SCHD nets roughly 3.0%. JEPI still wins on income, but the gap is much smaller than the headline yields suggest, and it gets worse as your bracket rises.
June 18, 2026 · 7 min read Read →
Fund Mechanics
What Happens to Your ETF When the Fund Shuts Down?
Your money is safe. That's the reassuring part. A closure triggers a forced sale, which is a taxable event in a taxable account whether you were ready for it or not.
June 18, 2026 · 6 min read Read →
Investing Strategy
Should You Buy ETFs When the Market Is at All-Time Highs?
The data says yes. Waiting for a dip sounds prudent — it is actually one of the more expensive mistakes new investors make. Vanguard found lump sum beats DCA in about 2 out of 3 twelve-month periods.
June 16, 2026 · 6 min read Read →
Cash & Bonds
SGOV vs Money Market Funds: Which Holds Your Cash Cheaper?
Both park your cash in safe, short-term government paper. The real differences are fee, taxes, and how fast you can move the money. A high state tax rate can settle it.
June 12, 2026 · 6 min read Read →
Cash & Bonds
SGOV vs VMFXX: ETF or Money Market Fund for Your Cash?
VMFXX is the default cash fund at Vanguard. SGOV is a Treasury ETF you can hold anywhere. The fee gap is two basis points. The tax difference is bigger, and it usually decides it.
June 12, 2026 · 5 min read Read →
Market Mechanics
Space ETF Searches Are Up 250%. SpaceX Is Why.
Investors searching for SpaceX exposure are landing on NASA, ROKT, and ARKX. None of them hold SpaceX. Here is what they actually own and which one is closest to the thesis.
June 9, 2026 · 8 min read Read →
Market Mechanics
There Is No EUV ETF. Here Is How to Get ASML Exposure.
Searches for "EUV ETF" are up 2,000% in a month. No dedicated fund exists. But ASML sits inside several semiconductor ETFs you already own. Here is exactly where.
June 9, 2026 · 5 min read Read →
Portfolio Strategy
The ETF Overlap Problem
You own VTI, QQQ, and VOO. You think you're diversified. You're holding Apple four times and calling it a strategy. Here's what overlap costs and how to check yours.
June 8, 2026 · 6 min read Read →
Cash & Bonds
SGOV vs Buying T-Bills Directly: Is the 0.09% Fee Worth It?
SGOV holds the same Treasury bills you could buy yourself, and charges 0.09% to do it. Here is when buying direct actually wins, and when the fee pays for itself.
June 4, 2026 · 6 min read Read →
Taxes & Accounts
JEPI's 8% Yield Isn't 8% in a Taxable Account
Most of what JEPI pays you is taxed as ordinary income, not qualified dividends. In the 24% bracket, an 8% yield becomes roughly 5.9% after taxes. Here is the math.
June 3, 2026 · 6 min read Read →
ETF Culture
Spurs vs. Knicks: Every NBA Finals Star Has an ETF Twin
Victor Wembanyama is an alien. Jalen Brunson was the 33rd pick and is four wins from a title. The 2026 NBA Finals, translated into ETFs.
June 2, 2026 · 5 min read Read →
Market Mechanics
DRAM Isn't Just a Ticker. It's the Memory ETF Bringing the Drama.
The Roundhill Memory ETF is up 92% in 12 months and searches for it rose 1,700%. Here's what it holds and why AI changed the memory chip market.
June 1, 2026 · 7 min read Read →
Market Mechanics
ETF Flows: The Market's Real-Time Vote
Billions pour in and out of ETFs every trading day. That movement is the market's collective conviction, expressed in actual dollars. Here's how to read it.
May 31, 2026 · 7 min read Read →
Investing Strategy
Your Portfolio Needs Flow
Jay-Z described it as being perfectly in sync with the beat. The best investors do the same thing. It has nothing to do with picking stocks.
May 31, 2026 · 6 min read Read →
Fund Comparisons
VOO vs VTI: Two Great Funds, One Clear Difference
VOO holds 505 stocks. VTI holds 3,700+. Both charge 0.03%. Here's what that difference actually means for your portfolio, and which one has the edge.
May 30, 2026 · 8 min read Read →
Beginner Investing
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. Here's how each platform handles it for ETFs.
May 27, 2026 · 7 min read Read →
Fees & Costs
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.
May 23, 2026 · 7 min read Read →
The Expense Report Newsletter

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