Investing Basics: Where to Start
Investing basics come in the order the decisions arrive: an emergency fund first, then the time horizon and how much falling you can sit through, then the account, then what to hold and what it costs. What to buy comes last, because the earlier decisions decide which choices fit.
Most first-time investors start with the last question, which fund or which stock, and work backwards. This path runs the other way, because the earlier decisions are the ones you control completely, and they narrow the last one down to a short list.
The reading path
- The Emergency Fund, and Why It Comes First The buffer comes first, so that a surprise bill never has to be paid by selling at a bad moment.
- How to Start Investing The four decisions in the order they should be made, with what to buy deliberately last.
- Time Horizon When the money is needed, which decides how much of a fall it can wait out.
- Risk Tolerance What you will actually do when the value falls, which is a different question from how you feel.
- Brokerage Accounts The account everything runs through, and the two settings that decide most of what can go wrong.
- What Is an Index Fund? Owning the whole index in one fund, and why the fee is the lever you control.
- Expense Ratio The fee in detail: charged every year, known in advance, and compounding against you.
- Asset Allocation The split between stocks, bonds and cash, which is a decision about falls rather than a forecast.
- Diversification Holding things that do not fail for the same reason, which is not the same as holding many things.
- Compound Interest: The Year Growth Takes Over Why the first decade looks like nothing is happening, and when growth finally overtakes deposits.
- The Three-Fund Portfolio A complete portfolio in three decisions, made once, with almost nothing left to manage.
- How to Buy an Index Fund The purchase itself: index first, account second, fund third, then automate it.
How to read this path
The first page is not about investing at all. An emergency fund is cash, held so that an unexpected cost does not have to be met by selling an investment during a fall. It comes first because every later page assumes the money invested can be left alone.
Pages two to four are about you, not the market. The basics page sets the order of decisions, the time horizon page asks when the money is needed, and the risk tolerance page asks what you would do if it fell by a third. Those answers decide the allocation long before any fund is compared.
Pages five to seven are the container and its cost. The brokerage account holds everything, the index fund is the default thing to hold inside it, and the expense ratio page explains why the fee deserves more attention than the fund’s name or its recent return.
Pages eight to ten are how the pieces behave together. Allocation, diversification and compounding describe the portfolio over years rather than any single holding. Compounding sits here because its lesson, that the early years look slow, is what keeps the plan in place long enough to work.
The last two pages are the doing. The three-fund portfolio is one complete answer to everything above, and the buying page is the procedure.
A worked example
The fee. The index fund page runs one example worth redoing: $10,000, an assumed 7% a year before costs, held for 30 years. At a 0.03% fee the pot ends at $75,485. At 0.75% it ends at $61,641. The difference is $13,844, about 18% of the $75,485, from a number that was known on day one. The 7% is an assumption; the gap between the two fees is arithmetic.
The allocation. Take a hypothetical 60/40 portfolio: $60,000 in stocks and $40,000 in bonds. If stocks fall by half and bonds hold their value, the stocks are worth $30,000 and the whole portfolio $70,000, a fall of 30%. The same fall on an all-stock $100,000 portfolio is 50%. Allocation is the decision about which of those two numbers you can hold through without selling.
The horizon. The site’s S&P 500 series shows why the horizon comes before the fund. Measured on every start date since 1950, 74.6% of one-year holding periods ended higher, 84.2% of five-year periods and 93.1% of ten-year periods, on price alone. Money needed next year sits in a very different set of odds from money needed in ten.
The original data
Beginner investing is one of the best-watched subjects in the study. In the site’s study of 24,971 YouTube trading and investing videos, the median video has 10,684 views. Titles naming index funds number 132, from 87 channels, with a median of 69,951 views, more than six times that. Titles with “how to invest”, “how to start investing” or “investing for beginners” number 247 with a median of 49,942.
Other basics sit much closer to the middle. ETF titles number 433 with a median of 12,485, and dividend titles 377 with a median of 12,540. Compound interest or compounding barely appears in a title at all: 5 videos. Counts are unique videos whose title contains the phrase as whole words, with views as displayed in August 2026.
The holding-period figures in the example come from the site’s own S&P 500 daily closes, 1950 to 2026. Every twenty-year window in that series, 14,260 of them, ended higher, and the worst one-year window fell 48.8%. Both facts belong in the same sentence, because a long horizon only helps if the plan survives the bad single years inside it.
When it fails
These figures are on price alone. The S&P 500 series leaves out dividends, so the long-horizon odds above are the conservative version. It also describes one index in one country. A single market’s history is one path, and the next twenty years may not follow it.
A long horizon only works if nothing forces a sale. The allocation arithmetic assumes the money stays invested through a 30% or 50% fall. Someone without an emergency fund, or with a horizon shorter than they thought, sells at the bottom and turns a temporary fall into a permanent loss. That is why the path starts with cash and the horizon, not with funds.
This path leaves out the tax wrapper. Which account holds the investments, a workplace plan, an individual retirement account or an ordinary taxable account, changes how much of the return you keep. That is a large enough subject to have its own path, and it is the natural next read after this one.
Timing the entry is not on the path for a reason. Waiting for a better moment to start is a forecast, and the market timing page covers why it needs two correct calls rather than one.
Related
The account decision this path postpones is covered in order by the retirement accounts path, from the workplace plan and its match to the Roth comparison. For a smaller, higher-risk position alongside a core portfolio, the crypto path covers custody, sizing and tax. Two pages sit close to this one and are worth reading once the basics are in place: dollar cost averaging on investing a fixed amount on a schedule, and buy and hold on staying invested through the long stretches below a previous high.
This page is educational, not financial advice. Test every idea on your own charts before risking money.