New on FinoLib · Volume V: Personal Finance
I have just published a new article on FinoLib, my free finance education library: Investing for 20 Years: Three Strategies for $10,000. It is part of Volume V: Personal Finance. It is part 3 of a 3-part guide. Below is a summary of the topic in plain, expert language, so you can follow the idea even before you open the full article.
A closer look
Asset location, distinct from asset allocation in 7.4, keeps the same overall mix but puts the least tax-efficient holdings in sheltered accounts.
Municipal bonds. Interest on most state and local bonds is free of federal income tax, so compare them using the taxable-equivalent yield = muni yield ÷ (1 − marginal rate). An assumed 3.5% muni yield equals 3.5% ÷ (1 − 0.22) = 4.49% taxable in the 22% bracket, 3.5% ÷ 0.68 = 5.15% at 32%, but 3.5% ÷ 0.88 = 3.98% at 12% — munis suit higher brackets (state tax ignored).
Step-up at death. Heirs take inherited investments at their market value on the date of death, so gains built up during the owner’s life are never taxed (11.7: Windfalls and Inheritances: What to Do When a Large Sum Arrives). Losses have a use too: tax-loss harvesting and the wash-sale rule are in 9.5.
Vol. III’s Part 6 cataloged the biases behind institutional market behavior; every one of them shows up, often more severely, in individual investors managing their own money — usually as small, reasonable-feeling decisions made at the wrong moment.
A worked example
Worked Example — Panic-Selling a $50,000 Balanced Portfolio
Illustrative assumptions: a $50,000 portfolio of stocks and bonds falls 20% to $40,000. One investor sells and holds cash earning 4% for a year; during that year the portfolio climbs 25% back to $50,000, and the investor then buys back in. The other does nothing. The seller has $40,000 × 1.04 = $41,600; the investor who stayed has $40,000 × 1.25 = $50,000. The gap is $8,400. Both then earn an assumed 7% a year for 20 years: $50,000 × 1.07^20 = $50,000 × 3.8697 = $193,484 against $41,600 × 3.8697 = $160,979. One year out of the market costs $32,505 at the end ($8,400 × 3.8697) — before any tax on gains realized by selling in a taxable account.
Decision rule
If the money is needed within five years, keep it in savings, Treasury bills or CDs. If it is for five years or more, invest it in broad index funds or one target-date fund with a total expense ratio of 0.20% or less (in a workplace plan, a target-date fund at 0.30% or less passes, 7.8), set a stock share you would keep through a 20% fall (7.4), invest new money as soon as it arrives, and rebalance once a year or when any holding drifts more than five percentage…
The costliest mistake
Moving in and out of the market at the wrong times. Morningstar put the gap between what funds earned and what the average fund dollar earned, driven by the timing of purchases and sales, at 1.2 percentage points a year over the decade to 2025 (see the research above). Apply that gap to the household’s $6,750 a year for 30 years at an assumed 7%: FV = $6,750 × [(1.07^30 − 1) ÷ 0.07] = $6,750 × 94.461 = $637,610, against $6,750 × [(1.058^30 − 1) ÷ 0.058] = $6,750 × 76.330 = $515,226 at 5.8%.
When This Breaks
“Fill tax-advantaged accounts first” exists because sheltered growth compounds faster, as the example shows. It assumes the money stays invested until retirement. Money needed before 59½, or for a goal within about five years — a down payment, a career break — belongs in a taxable account or savings: early withdrawals of traditional money and Roth earnings generally owe tax plus the 10% additional tax.
Edge Cases: When the Standard Answer Changes
The defaults in 7.3–7.6 assume ordinary income and a decent plan menu. These situations change them: Situation What changes Why Number or rule Your 401(k) offers only high-cost funds Still contribute enough to get the full match; put the rest in an IRA with cheaper funds An immediate 50% match outweighs years of fee drag Match on $4,500 = $2,250 in year one; a 1% fee on $4,500 = $45 Buying a mutual fund in a taxable account in November…
Recap
Saving preserves principal for a known date; investing accepts volatility for a higher expected return over five years or more, and compounding, FV = P × (1 + r)^n, makes time the most powerful input: $10,000 at an assumed 7% becomes about $76,123 in 30 years. Before you compare a projection with a goal, convert it to today’s dollars, since 7% nominal with 3% inflation is about 3.88% real.
What the full article covers
The full article includes worked examples, a clear decision rule, the one mistake that costs people the most, a recap, a reveal-on-click quiz and the official sources behind every figure.
Volume V: Personal Finance
Read the full article on FinoLib
The complete article, Investing for 20 Years: Three Strategies for $10,000, with every worked example, diagram, quiz and source, is free to read in Volume V, Personal Finance on finolib.com.
Explore the Finance Education Series: Vol. II — Capital Markets · Vol. I — Global Economy · Vol. III — Finance Encyclopedia · Vol. IV — Finance Careers · Vol. V — Personal Finance