Start with understanding
Investing Basics
Understand a little. Practice once. Write your own plan. Each lesson explains an idea with an example, then asks you to answer a question and write a short reason before reading the explanation. Gather your thoughts as you learn, then follow the prompts to write your own learning or investment plan.
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Understand a little. Practice once. Write your own plan.
Each lesson explains an idea with an example, then asks you to answer a question and write a short reason before reading the explanation. Gather your thoughts as you learn, then follow the prompts to write your own learning or investment plan.
Start the first lessonLearning progress: 0 / 8
Market snapshot
A market snapshot lesson
Practice reading a quote with SPY, a broad-market ETF used here as a teaching example, not a recommendation.
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ETF
- Plain meaning
- A fund pools investors’ money and invests toward a stated objective. An ETF is a fund whose shares trade on an exchange. One ETF share gives you a small interest in the fund, which may hold stocks, bonds, or other assets described in its disclosures.
- See it in an example
- Imagine two ETFs with different names that invest heavily in the same technology companies. Both could fall when those companies struggle. Their actual holdings tell you more than their names.
- When would I use this?
- In a fund’s disclosures, locate its objective, main holdings (the assets it owns), their weights, and its fees. Add anything unclear to your learning questions.
- Common misconception
- Owning an ETF does not automatically provide broad diversification. A fund focused on one sector can still be concentrated, and returns are not guaranteed.
Percentage change
- Plain meaning
- Percentage change tells you how much a price rose or fell relative to a baseline. Quote pages often use the previous trading day’s close, but always check the stated baseline and quote time.
- See it in an example
- If the previous close was 100 and the current quote is 102, the change is (102 − 100) ÷ 100 = 2%. If you bought at 110, today’s 2% rise does not mean your holding is profitable.
- When would I use this?
- For a quote, check baseline, currency, and time. For your own return, also examine purchase cost, fees, and dividends.
- Common misconception
- A percentage change describes the size of a move. It does not by itself explain the cause or measure your account return.
8 short lessons
Start with why you want to invest and when you will need the money.
See all lessonsExplore historical cases →My plan
No confirmed plan yet. Save a draft, or simply keep learning.
My planLearning and research support; no personal trade instructions or guaranteed returns. · Version 2026-09-13.1