# Investment Basics > Teaches personal investing fundamentals - readiness checks, asset allocation, diversification with low-cost index funds, fee awareness, tax-advantaged account ordering, and rebalancing - and produces a written starter plan. Use when someone asks "how do I start investing", "what should my stock/bond split be", "are index funds enough", or "should I invest or pay off debt first". General financial education, not personalized investment advice. Do NOT use for a full multi-goal financial plan with budgeting and insurance - use financial-planner instead; do NOT use for modeling when someone can retire - use retirement-projection instead; for building the cash cushion first, see emergency-fund-planner. - Skill: `skillmedev/investment-basics` (Agent Skill) - Install (CLI): `npx skillmds@latest add skillmedev/investment-basics` - Raw SKILL.md: https://api.skillmd.com/api/skills/skillmedev/investment-basics/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: SkillMedev (https://skillmd.com/u/skillmedev) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/skillmedev/investment-basics --- # Investment Basics The costliest beginner mistakes are not bad fund picks - they are investing before the foundation exists, paying 1%+ in fees for decades, concentrating in single stocks or employer stock, and panic-selling in the first real downturn. This skill produces a boring, durable starter plan and a written allocation the user can hold through a crash. This is general financial education, not personalized investment, tax, or legal advice. Markets carry risk and losses are possible. Account types, contribution limits, and tax rules vary by country - always verify local rules. ## Operating procedure Order matters: readiness gates come before allocation, and allocation comes before any fund discussion, because allocation drives the large majority of a portfolio's risk and return - fund selection is a rounding error next to it. ### Step 1: Gather inputs Collect, with defaults where the user is unsure (label guesses as guesses): - Emergency fund status (target: 3-6 months of expenses in cash; route to emergency-fund-planner if absent). - Any debt above roughly 7-8% interest - payoff usually beats expected market returns; anything at 15-25% (credit cards) always does. Route to debt-payoff-planner. - Employer retirement match available and whether it is being captured. - Time horizon per goal (retirement, house, education) and honest reaction to a hypothetical 30% portfolio drop. - Amount available monthly to invest. ### Step 2: Apply the readiness gates Do not proceed to market investing until, in order: (1) any employer match is captured - it is an immediate 50-100% return and beats everything else; (2) high-interest debt (above ~7-8%) is gone; (3) the emergency fund exists. Investing money that may be needed within ~5 years belongs in cash or short-term instruments, not stocks. ### Step 3: Set the asset allocation The stock/bond split is the single decision that matters most. Anchor points: - "110 minus age" in stocks is a defensible starting heuristic (age 30 → ~80% stocks / 20% bonds); shift 10-20 points more conservative if the user says they would sell in a 30% drop. - Horizon under 5 years: mostly cash/bonds. 5-15 years: blended. 15+ years: stock-heavy is rational because volatility washes out over long horizons. - Stocks deliver higher long-term growth with higher short-term volatility; bonds cushion downturns; cash is liquid but loses to inflation; real assets are optional diversifiers, not core. Write the target percentages down. An allocation that only exists in the user's head gets abandoned at the first crash. ### Step 4: Choose vehicles - diversified and cheap - Core holdings are broad, low-cost index funds spreading risk across hundreds or thousands of companies - never single stocks. A total-market stock fund plus a total bond fund covers most needs; a target-date fund is a legitimate one-fund answer. - Expense-ratio red lines: broad index funds are widely available under 0.10%; treat anything above 0.50% as needing strong justification, and above 1% as a red flag. A 1% annual fee compounds into losing roughly a quarter of a portfolio's value over 30 years versus a 0.1% fund. - Cap any single stock - including employer stock - at 5-10% of the portfolio, treated as satellite money the user can afford to lose. ### Step 5: Order the accounts for tax efficiency General priority (verify local equivalents): employer match first, then tax-advantaged retirement accounts up to their limits, then taxable brokerage. Hold tax-inefficient assets (bond interest, high-turnover funds) inside sheltered accounts where rules allow. ### Step 6: Automate and pre-commit behavior Set an automatic monthly transfer on payday (dollar-cost averaging) - investing regularly regardless of headlines removes the timing decision, and time in the market generally beats timing the market. Have the user write one sentence now: "When the market falls 30%, I will do nothing except continue my automatic contributions." Panic selling locks in losses; this sentence is the cheapest insurance available. ### Step 7: Rebalance on a rule, not a feeling Once or twice a year - or when any asset class drifts more than 5 percentage points from target - sell what grew and buy what lagged back to target. This enforces buy-low/sell-high mechanically. Prefer rebalancing with new contributions in taxable accounts to avoid realizing gains. ## Worked artifact: starter plan ``` INVESTMENT STARTER PLAN - [FILL: name], [FILL: age] Gates: Match captured: [FILL y/n] High-interest debt: [FILL none/plan] Emergency fund: [FILL months] Allocation: [FILL]% stocks / [FILL]% bonds (basis: [FILL horizon + risk tolerance]) Vehicles: [FILL: total-market index fund, ER < 0.10%] / [FILL: total bond fund] Accounts: 1) employer plan to match 2) [FILL: tax-advantaged account] to limit 3) taxable Automation: $[FILL]/month on payday, auto-invested Rebalance: every [FILL: 6/12] months or at 5-point drift Crash rule: "When markets fall 30%, I will do nothing except keep contributing." ``` Bad: "Markets look shaky, so hold cash until things settle, then buy quality stocks like the ones in the news." Good: "80/20 total-market index allocation, $500 automated monthly, rebalance each January, ignore headlines" - no forecast required, every action is a standing rule. ## Deliverable Produce a one-page starter plan containing: the readiness-gate results, a written stock/bond allocation with its rationale, named vehicle types with expense-ratio ceilings, the account priority order with a note to verify local tax rules, the automation amount and date, the rebalancing rule, and the signed crash-behavior sentence. ## Do NOT - Do not discuss fund picks before the allocation is set - allocation drives most of the outcome. - Do not let a beginner start with single stocks or crypto as core holdings; cap speculative positions at 5-10%. - Do not skip the readiness gates; investing while carrying 20% credit-card debt is a guaranteed negative-return decision. - Do not quote country-specific account names or contribution limits as universal facts; flag them for local verification. - Do not present past returns as promises; use them only to explain why long horizons favor stocks. ## Quality bar - Every gate (match, debt, emergency fund) is explicitly checked, not assumed. - The allocation is written down with both horizon and risk-tolerance justification. - Every recommended vehicle type carries an expense-ratio ceiling. - The plan contains standing rules only - no action requires a market forecast. - The education disclaimer and local-rules caveat appear in the deliverable. ## Escalation This skill educates; it does not advise. Route to a licensed, fee-only fiduciary advisor for: significant windfalls or concentrated stock positions, equity compensation decisions, cross-border tax situations, or anyone who wants a recommendation on a specific security. For the full picture beyond investing - budgets, insurance, estate basics - use financial-planner; for "when can I retire" math, use retirement-projection; for optimizing the tax side, see tax-optimization.