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How does investing work? A plain-English guide

Investing is just putting money into something that earns more money. Here’s where the returns come from, and the few ideas that matter most.

The title of this post in white over a dim photo of the New York Stock Exchange floor.

Photo: Library of Congress (public domain)

TL;DR

  • You buy something that earns money: part of a company, a loan to a government or business, or property.
  • You make money in two ways: income (dividends, interest, rent) and a rise in price. Together they’re your return.
  • More possible return comes with more risk. Over long periods, stocks have returned about 10% a year, bonds less, cash less still.
  • LemonTrades tells you what moved your investments, and why, as it happens.

Saving keeps your money. Investing puts it to work. Here’s how that work turns into a return.

What you can invest in

You buyYou ownHow you get paid
StocksA share of a companyDividends, and a rising share price as profits grow
BondsA loan to a government or companyInterest, and your money back at the end
Funds (ETFs, mutual funds)A basket of many stocks or bondsWhatever the basket earns, minus a small fee
PropertyA building or landRent, and a rising value
CashA bank deposit or money market fundInterest
Gold, cryptoAn asset that pays nothingOnly a rise in price

Risk and return

Long-run return a yearA bad year
CashAbout 3%Rarely loses money, but can trail inflation
BondsAbout 5%−13% in 2022
StocksAbout 10%−37% in 2008

Rough long-run US averages, before inflation. The extra return from stocks is your pay for sitting through their bad years.

Compounding: the most important idea

When your returns earn returns of their own, growth speeds up. $10,000 earning 7% a year becomes about $19,700 after 10 years, and about $76,100 after 30. Most of that 30-year gain comes in the later years, which is why starting early matters more than starting big.

Spreading out

Any one company can fail, but a fund owning hundreds of them rarely suffers much from one. That’s why index funds like VOO are a common first investment. See what an ETF is.

Why fees matter

A 1% yearly fee sounds small. On a 7% return over 30 years, it leaves you with about 25% less money. Low-cost index funds charge under 0.1%.

Why prices go up and down

In the short run, prices move on news, interest rates and mood. Over years, they follow profits and income. See how stock prices are set and how the stock market works. Ready? See how to start investing money.

Sources

Education, not financial advice. All investing involves risk, including the loss of your money. See our disclaimer.

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