Investing strategy, from the basics up

2026-05-31

An earlier post made the case for why to invest. This is the operating manual: a simple portfolio, sensible account order, and rules that make it easy to stay invested for decades. It starts with concepts and ends with the U.S. funds I use.

This post uses U.S. accounts and tax rules. Adapt the framework to your circumstances, and treat the percentages as examples.

In this post: Mindset · Strategy · Core · International · Roth · Cash · Accounts · Spending · Behavior · Tickers

The mindset: think long term, keep it simple

Investing converts income into ownership of businesses. Buy broadly, hold for decades, and keep contributing through drawdowns. A market decline is lower prices for the same shares, not a reason to abandon the plan.

Think in decades, not quarters. Money needed within five years belongs in safer assets.
Pay high-interest debt first. Its guaranteed cost beats realistic investment returns.
Raise the savings rate from both ends. Spend deliberately, increase your professional value, and turn higher income into more equity ownership. That matters more than small allocation changes.
Keep the portfolio simple. Every extra fund adds monitoring, tax work, and temptation to tinker.
Avoid complexity you do not understand. Real estate, individual stocks, options, leverage, and crypto are separate disciplines.

This is a majority-equity plan. After the initial cash shield, almost every new dollar goes to stocks. Equity can fall 30% to 50% in a bad year, so the plan works only if you keep buying and do not sell into the decline.

The whole strategy, in one picture

The portfolio is a cash shield, an S&P 500 core, developed international, and a Roth tilt. Use tax-advantaged accounts where available.

flowchart LR
    subgraph EQ["Equity (majority of portfolio)"]
      direction TB
      CORE["S&amp;P 500 core (~70%)"]
      INTL["Developed international (~15%)"]
      ROTH["Roth tilt (~15%)<br/>small caps + emerging markets"]
    end
    subgraph SH["Cash shield (3mo to 1yr expenses)"]
      SHIELD["T-bills + money market"]
    end

    CORE --> TX["Taxable + 401(k) + Roth + HSA"]
    INTL --> TX
    ROTH --> RO["Roth IRA"]
    SHIELD --> CMA["CMA"]

The account labels are simpler than they sound:

Taxable brokerage: flexible access, with taxes on dividends and realized gains.
401(k) and Traditional IRA: usually pre-tax contributions, tax-deferred growth, and ordinary-income tax on withdrawal.
Roth IRA: after-tax contributions, then tax-free qualified growth and withdrawals.
HSA: tax-deductible contributions, tax-free growth, and tax-free qualified medical withdrawals when eligible.
CMA: a cash-management account used for spending cash, Treasury bills, and money-market funds.

Sleeve	Account	Allocation	At $1M
S&P 500 core	Taxable + 401(k) + Roth + HSA	~70%	$700k
Developed international	Taxable brokerage	~15%	$150k
Small caps + emerging markets	Roth	~15%	$150k
Cash shield	CMA	3 months to 1 year of emergency expenses	Same expense-based target

Allocations are percentages of equity, except the cash shield. Size the shield by essential expenses, not portfolio value. As the portfolio grows, its percentage naturally shrinks.

Under ~$100k: just buy the S&P 500

Below ~$100k, income and savings rate matter more than asset location. Avoid buying a collection of overlapping funds.

Build three months of essential expenses in cash.
Then put the first retirement dollars into the 401(k) up to the employer match, followed by the Roth IRA. Starting the Roth IRA early gives tax-free growth more time to compound.
If eligible, start HSA contributions as early as possible too. Invest the balance in the S&P 500.
Hold the S&P 500 across accounts. Starting young gives equity ownership the longest runway to compound.
Grow the cash shield alongside the portfolio toward six months, then as much as one year as the portfolio becomes bigger.
Focus active effort on career growth, professional brand, skills, earned income, and spending discipline.

The equity core: the S&P 500 (~70%)

The core is the cheapest available S&P 500 fund in each account. It owns large U.S. businesses, automatically captures changing leadership, and avoids the need to predict winners.

Keep the core fee near zero, ideally under ~0.03%. A higher-cost active fund has to overcome its fee every year.

Why the S&P 500, not total U.S. market? A total-market fund adds mid- and small-cap growth exposure. I prefer a cleaner large-cap core, then choose the international and small-cap tilts separately.

Why about 70% U.S.? Global market weight is roughly 60% to 65% U.S., so 70/30 is a modest overweight of the largest market. The S&P 500 also earns substantial revenue overseas. If you prefer 60/40 or 50/50, that is reasonable.

Quick definitions

Index fund: a fund that follows a published index rather than relying on a manager to pick stocks.
Market cap: share price times shares outstanding. The S&P 500 covers roughly 80% of the U.S. market by value.
Growth and value: growth stocks trade at higher prices relative to current earnings. Value stocks are priced more cautiously. A broad index owns both.

International in taxable, emerging in Roth (~15%)

Developed markets and emerging markets belong in different accounts.

Taxable holds developed international. Developed-market dividends can qualify for the lower qualified-dividend-income rate, and foreign taxes withheld may qualify for a foreign tax credit.
Roth holds emerging markets and small caps first, then the S&P 500 core. Emerging-market dividends generally do not qualify for QDI, which makes the Roth the better location for the tilt. After the tilt reaches its target, use remaining Roth space for the core.

Taxable may fund the years between retirement and age 59½, so it should contain relatively stable, tax-efficient holdings. Emerging markets and small caps belong in the Roth, not taxable.

A screen for taxable: beta. Beta measures how much a fund moves relative to the market. Keep taxable holdings at or below the S&P 500’s beta of about 1.0. The core and broad developed-market index generally qualify. Check before buying.

International adds currency diversification, different valuations, and sectors that are underrepresented in the S&P 500. It is a different return stream, not just foreign revenue inside U.S. companies.

The Roth hedge: small caps and emerging markets (~15%)

The Roth tilt holds small-cap value funds, in U.S. and international markets, plus emerging markets. It may also include one semiconductor stock under the 5% concentrated-position cap. These are the portfolio’s higher-volatility growth tilts, and the Roth keeps their growth tax-free.

The 15% cap applies to the tilt, not to the size of the Roth accounts. Maximize Roth contributions as much as possible. The first goal is for the Roth portion itself to grow beyond 15% of the total portfolio. Once the Roth is larger than the tilt, put additional Roth dollars into the same S&P 500 core used elsewhere.

Small-cap value has historically offered a size and value premium with deeper drawdowns. That premium can lag for long stretches, so treat it as a modest tilt, not a forecast.

The cash buffer: your shield against forced selling

Use the trailing six months of essential spending to estimate the monthly run rate. Build the first three months in a high-yield savings account or money-market fund. As soon as that is ready, begin buying equity. Do not wait for a full six months or one year before building ownership. Grow the shield alongside the portfolio toward six months, then as much as one year as the portfolio becomes bigger. One year of emergency expenses is the upper limit.

The buffer addresses sequence-of-returns risk. If income stops during a market decline, spend the buffer instead of selling stocks at depressed prices.

flowchart LR
    C[Market drops 30%] --> S[Income stops]
    S --> N[Need cash for essentials]
    N --> BAD["Without shield:<br/>sell equity at the bottom"]
    N --> OK["With shield:<br/>spend cash while equity recovers"]
    style BAD stroke:#c62828,stroke-width:2px
    style OK stroke:#2e7d32,stroke-width:2px

This is not a strategic bond allocation or a 60/40 portfolio. The shield exists to cover essential spending and prevent forced selling.

In the U.S. version, hold short-term Treasury bills and a government money-market fund in a CMA, separate from the brokerage. Review its dollar target quarterly against the trailing six months of essential spending. During accumulation, new money goes back to equities after the current shield target is full. In retirement, dividends can refill it in normal years. Spend it during a market decline rather than selling equity to maintain it.

Accounts: fill the tax-advantaged ones first

The universal order starts with free employer money, then tax-free compounding:

401(k) to the employer match.
Roth IRA. Start it early and maximize it when possible. Use a backdoor Roth if income requires it.
HSA to the limit if eligible. Start contributing as early as possible.
401(k) pre-tax contributions beyond the match.
Mega-backdoor Roth if the plan supports after-tax contributions and in-plan conversions.
Taxable brokerage for the rest.

The account names differ by country. The U.S. details below explain the asset location.

The tax engine: QDI + asset location

Qualified dividend income, or QDI, is taxed at the long-term capital-gains rate rather than ordinary-income rates. In retirement, QDI and realized long-term gains can fall in the 0% federal bracket at sufficiently low income. For 2026, the rough gross-income ceilings are about $65k for a single filer and $131k for married filing jointly, depending on deductions and income mix.

Account	Holdings	Reason
Taxable brokerage	S&P 500 and developed international	High QDI and foreign tax credit potential
Roth IRA	Small caps and emerging markets, then S&P 500	Tax-free growth for the tilt and remaining core
401(k)	S&P 500	Simple core in a tax-deferred account
HSA	S&P 500	Highest expected-return liquid asset in a triple-tax-advantaged account
CMA	T-bills and money market	Cash shield

The practical rule is to hold tax-efficient assets where taxes apply and place less tax-efficient growth tilts in Roth accounts.

The cash flow: paycheck to portfolio

Automate the 401(k) match through payroll, then make the Roth IRA contribution early in the calendar year if cash flow permits. Begin HSA payroll contributions as soon as you are eligible and maximize the account when possible. Starting both accounts early means more time invested. Use additional 401(k) space next, then taxable brokerage.

The backdoor Roth IRA is a practical option when income exceeds the direct Roth limit:

Contribute the annual limit to a non-deductible Traditional IRA.
Convert it to the Roth IRA promptly.
Buy the Roth tilt or, once the tilt is full, the S&P 500 core.

The pro-rata rule applies if you hold pre-tax money in a Traditional, SEP, or SIMPLE IRA on December 31. Rolling eligible old IRAs into a current 401(k) can avoid that complication.

If a 401(k) supports both after-tax contributions and in-plan Roth conversions, the mega-backdoor can create additional Roth space above the normal employee deferral limit. Convert after-tax contributions promptly. Without the conversion, their gains are taxed as ordinary income on withdrawal.

The HSA has three advantages: deductible contributions, tax-free growth, and tax-free qualified medical withdrawals. Payroll contributions may also avoid payroll tax. Start early, invest the balance rather than spending it when possible, pay current medical costs from cash, and retain receipts. There is no deadline to reimburse qualified expenses, so the account can compound for decades first.

Once per quarter, invest accumulated cash and dividends into the most underweight sleeve. I leave dividend auto-reinvestment off so distributions become rebalancing cash. This is a schedule, not market timing. The money goes in each quarter regardless of headlines or prices.

Spending: budget every transaction

Asset allocation cannot compensate for a weak savings rate. Track every transaction so the spending number is observed rather than guessed.

Use only a few credit cards. Two or three make the transaction feed and full-balance autopay easy to manage.
Set one monthly spending ceiling. A total cap handles irregular expenses better than brittle category limits.
Review trailing six-month spending. Six months smooths noisy individual months while staying close to current spending.

If the cap is missed repeatedly, inspect subscriptions, fixed costs, and lifestyle creep. The savings rate, (gross income - taxes - spending) / gross income, moves the financial-independence timeline more than a plausible edge in investment returns.

The hardest part is not touching it

Keep investing passive. Contribute automatically, rebalance only quarterly, and direct new money to what is underweight. In taxable, that usually avoids selling and realizing gains.

Keep the portfolio passive so active effort can go where it has more leverage: your career, professional brand, and skills. Increase the value you can create, turn that into higher earned income, then use the additional savings to buy more equity. Over the next few years, that path is more likely to change the outcome than frequent portfolio activity. Check the portfolio once a quarter, make the scheduled buys, and move on.

Do not performance-chase a fund or theme after a strong year.
Cap all single-stock, thematic, and crypto positions at 5% of the portfolio in total. If one grows above the cap, trim the excess into the core. If it falls below the cap, do not add just to restore it.
Do not sell because of headlines, war, or politics.
Do not rotate among near-identical tickers. Tax friction and second-guessing cost more than basis-point differences.

A portfolio that needs daily attention is too complicated. Build one you can maintain in about thirty minutes each quarter.

Ruthless simplicity as a feature

The framework is an index core, a modest Roth tilt, tax-aware asset location, an expense-based cash shield, and behavior that makes it durable. New contributions go to the most underweight sleeve. Consolidate accounts at one investment provider when practical to simplify rebalancing, cost basis, and tax forms.

Skip actively managed funds, leverage, alternatives, and overlapping funds. A short plan you follow is better than a clever plan you abandon.

The actual tickers to buy

Fund choice comes last. Check expense ratio, AUM, and for taxable funds, QDI percentage and beta.

1. S&P 500 core

VOO (0.03%) is the largest and most liquid S&P 500 ETF.
SPYM (0.02%) tracks the same index at a slightly lower fee.
FXAIX (0.015%) is a convenient mutual fund for a 401(k), Roth, or HSA.

Use an ETF in taxable and a mutual fund in tax-advantaged accounts if that is operationally easier.

2. Developed international (taxable)

VEA (Vanguard, 0.03%) or SCHF (Schwab, 0.03%) are broad, low-cost developed-market funds with large AUM.
FNDF (Schwab Fundamental) can be a tax-efficient value-tilted satellite. Check its QDI before holding it in taxable.

3. Small-cap value (Roth)

AVUV (U.S.) and AVDV (international) provide the size and value tilt with profitability screens.

4. Emerging markets (Roth)

VWO (Vanguard) or IEMG (iShares Core) are standard low-cost options.
TSM (Taiwan Semiconductor) is a possible single-stock choice under the 5% concentrated-position cap.

5. Cash and bonds (CMA)

SGOV (iShares 0 to 3 Month Treasury Bond, ~0.09%) holds short-term Treasuries with interest exempt from state income tax.
SPAXX (Fidelity government money market) is a convenient auto-sweep.
VTEB (Vanguard Tax-Exempt Bond) or SUB (iShares Short-Term National Muni) can suit investors in a no-income-tax state.