Frequently Asked Questions About John's Money Adventures ETF Portfolio Builder
20 answers covering everything from basics to advanced usage.
// Basics
What is the difference between an ETF and a mutual fund?
An ETF is a basket of companies that trades like a stock and typically tracks an index passively with no active manager, resulting in very low expense ratios (often under 0.1%). Actively managed mutual funds have a manager making decisions and usually charge much higher fees, often over 1%. Over 30 years, that fee gap dramatically erodes returns — which is why this framework only uses low-cost ETFs.
What are the Three Filters and why does every ETF have to pass all of them?
The Three Filters are: (1) expense ratio under 0.2%, (2) you know exactly which index it tracks and what's inside it, and (3) a proven track record surviving multiple market crashes. All three matter because a cheap fund you don't understand can still blow up, and a fund you understand with high fees still bleeds money. A fund must pass every filter to earn an allocation.
What does 'Three Funds, Three Jobs' actually mean?
It means a portfolio is a set of roles, not a list of tickers. Every ETF must fill exactly one job: Stability (the broad, low-cost foundation like VOO), Acceleration (the growth engine like QQQ), or Balance (geographic diversification like VXUS). If a fund doesn't have a clear job, it doesn't have a place. This prevents overlap, redundancy, and buying funds just because they sound good.
// How To
How do I actually open a brokerage account for this?
Use Fidelity, Schwab, or Vanguard — all three are free to open with no account minimums, no monthly fees, and support every fund in both portfolio models. The process takes about 10 minutes: name, address, social security number, and a linked bank account. Avoid obscure platforms. Once open, transfer your lump sum (1-3 business days) and enable dividend reinvestment before buying.
How do I allocate my lump sum across the funds?
For the Starter Portfolio: 50% to VOO, 30% to QQQ, 20% to VXUS. For the Aggressive Growth Portfolio: 40% VOO, 35% QQQ, 25% VGT. Multiply your lump sum by each percentage — on $5,000 the Starter split is $2,500 / $1,500 / $1,000. Enter the dollar amount for each ticker, confirm the order, and repeat. Fractional shares handle any leftover amounts.
How do I scale the projections if my lump sum isn't $5,000?
Multiply the benchmark projections proportionally. The projections assume a $5,000 lump sum, so for $8,000 multiply every number by 1.6 (8,000 ÷ 5,000), and for $3,000 multiply by 0.6. Example: the $5,000 Aggressive Growth Year 30 value of $640,441 becomes roughly $1,024,657 at $8,000. These assume no additional contributions — adding money over time increases the outcome further.
How do I find a fund's underlying index and holdings?
Don't trust the marketing name — look up the fund on the brokerage or issuer's page and find the stated benchmark index (e.g., VOO tracks the S&P 500, QQQ tracks the NASDAQ 100). Then view the top holdings list to see what you actually own. Two funds can both call themselves 'index funds' yet own completely different companies, so verify before allocating.
// Troubleshooting
My portfolio dropped 25% — is the strategy failing?
No — a 20-30% drop is expected, not a sign of failure. Every major downturn in market history has been followed by recovery. The framework explicitly warns the portfolio will drop hard at some point. The failing move is selling; the investors who lost permanently were the ones who sold and never bought back in. Hold, let dividends reinvest, and do nothing.
My Year 1 return looks tiny — did I do something wrong?
No — Year 1 looks slow because it is slow. Compounding hasn't had time to build on itself yet, so the growth curve is nearly flat early on and steepens dramatically over decades. Benchmark Year 1 values are around $5,745 (Starter) or $5,933 (Aggressive) on $5,000. What matters is not what Year 1 looks like, it's what Year 1 starts.
One of my funds is way overweight now — what do I do?
Rebalance during your annual review only. If QQQ has drifted from 30% to 45% because tech ran hot, sell a little QQQ and buy a little of the underweight funds to restore your original targets. Don't do this weekly — over-rebalancing generates unnecessary activity and potential taxable events. If nothing drifted dramatically, leave it alone.
I forgot to turn on dividend reinvestment before buying — what now?
Turn it on immediately in your account settings; it's a single toggle. Any dividends already paid may have landed as idle cash — reinvest that cash manually into the appropriate fund according to your allocation. Going forward, the toggle ensures every future dividend automatically buys new shares. The setup is one-time and then runs for the lifetime of the investment.
// Comparisons
How does the Starter Portfolio compare to the Aggressive Growth Portfolio?
The Starter Portfolio (50% VOO, 30% QQQ, 20% VXUS) blends to ~13.64% average annual appreciation with international diversification for downside protection. The Aggressive Growth Portfolio (40% VOO, 35% QQQ, 25% VGT) removes VXUS, adds pure US tech, and blends to ~17.35% — but VGT drops harder than anything else in bad years. Higher ceiling, harder floor, and only for those who won't panic-sell.
How does this compare to just buying a single S&P 500 fund like VOO?
Buying only VOO gives you Stability but no Acceleration or Balance job. This framework adds QQQ to push the growth ceiling higher and VXUS (or VGT) to diversify or maximize growth. The result is a purpose-built portfolio where each fund has a defined role rather than a single broad bet. VOO alone is a fine start; the three-fund model is a more complete structure.
How does dollar-cost averaging compare to investing a lump sum this way?
This framework is built for a lump sum you invest today, because time in the market drives compounding. Dollar-cost averaging spreads purchases over time to reduce the risk of buying at a peak, which suits ongoing contributions from a paycheck. Neither is 'wrong' — if you have a lump sum and a 20-30 year horizon, investing it now and then adding contributions later combines both approaches.
// Advanced
Why is VXUS worth including when its returns are lower than US funds?
Because its job is Balance, not growth. VXUS (~6.56% average annual appreciation) is insurance, not an engine — international stocks don't always move with US stocks, so it buffers the portfolio when the US market has a bad decade. Judging it purely on return misses its role. The Aggressive Growth Portfolio removes it precisely because it trades that insurance for maximum growth via VGT.
What role does market capitalization weighting play in VOO?
Market cap weighting means larger companies make up a bigger share of the fund. In VOO (S&P 500), when the biggest companies grow, the fund grows with them; when a smaller company struggles, the impact is proportionally tiny because it represents a small fraction of the total. This self-adjusting structure is part of why the Stability fund is so battle-tested and reliable.
Why is VGT riskier than QQQ if both are tech-heavy?
VGT is pure US information technology — 300+ tech companies with Apple and Nvidia alone over 30% of the fund — so it's more concentrated than QQQ, which tracks the broader NASDAQ 100 including some non-tech names. Higher concentration means higher average appreciation (~21.54%) but also the hardest drawdowns when technology has a bad year. That concentration is the exact trade the Aggressive Growth Portfolio accepts.
Should I ever change my allocation as I get older?
The framework selects a model based on timeline and risk tolerance, so as your horizon shortens and your ability to stomach drops changes, a more conservative allocation may become appropriate. Someone at 40 with 20 years and moderate tolerance fits the Starter Portfolio rather than the aggressive one. Reassess your timeline and risk profile if your life circumstances shift meaningfully, not because of short-term market noise.
Does the annual rebalance create taxes I should worry about?
In a taxable brokerage account, selling an overweight fund can trigger capital gains, which is why the framework limits rebalancing to once a year and only when drift is significant. Over-rebalancing generates unnecessary taxable events without improving outcomes. In tax-advantaged accounts, rebalancing doesn't trigger taxes. Either way, the discipline is the same: review annually, act only on meaningful drift, otherwise leave it alone.
Can I add more money to the portfolio over time?
Yes — the benchmark projections assume no additional contributions, so any money you add on top only improves the outcome. Invest new contributions according to your chosen allocation (the Starter or Aggressive percentages) and let dividend reinvestment continue. Adding consistently over decades compounds alongside your original lump sum, dramatically increasing the long-term result beyond the baseline projections.