What are investments?

This guide explains what an investment actually is and where returns come from — the concepts behind the numbers the app shows you. It is the second of three beginner guides, following Why invest? and followed by Types of investments.

Educational content, not advice. These guides explain general concepts so the app's features make sense. They are not investment advice, and nothing here is a recommendation to buy or sell anything. Investments can lose value.

An investment is something you own that can pay you back

Every investment boils down to one of two arrangements:

Ownership — you buy a piece of something: shares of a company, a property, a fund, a cryptocurrency. You benefit if it becomes more valuable or pays out profits.
Lending — you hand money over for a promise of repayment with interest: a savings account, a term deposit, a bond, a peer-to-peer loan.

Ownership generally offers higher potential returns with more uncertainty; lending offers more predictable returns with lower ceilings (and its own risk — the borrower can fail to pay).

Where returns come from

There are only two sources, and many investments combine both:

Income — regular cash the investment pays you while you hold it: dividends from shares, interest from deposits and bonds, rent from property. The app collects all of these on your Income calendar.
Appreciation (capital gains) — the thing you own becomes worth more, and you realize the gain when you sell. Until you sell, the gain is "unrealized": real on paper, not yet in your pocket.

Total return is the two combined. A stock that rose 4% and paid a 2% dividend returned about 6%. Comparing investments on price change alone misses half the story.

Risk: the price of return

Risk is the chance that things turn out worse than expected — a share price falls, a borrower defaults, a property sits empty. A few ideas do most of the work of managing it:

Diversification. Owning many different things means no single failure can sink you. This is the one widely-agreed "free lunch" in investing: it reduces risk without necessarily reducing return. It's why beginner portfolios are usually built on broad funds rather than a handful of individual stocks.
Time horizon. Prices swing day to day, but diversified investments have historically recovered from downturns given enough years. Risk shrinks when you can afford to wait.
Liquidity. How fast can you turn it back into cash? Shares sell in seconds; a flat can take months; a term deposit locks money until maturity (or charges a penalty). Illiquid investments aren't bad — they just shouldn't hold money you might need soon.

Realistic expectations

Two things follow from all of the above, and they save beginners a lot of money:

Broad, diversified stock investments have historically averaged somewhere around 5–8% per year over long periods — with large ups and downs on the way. Anyone promising steady double-digit returns with no risk is selling something.
You don't need to pick winning stocks. Most beginners do well with broad funds that own a little of everything — see Types of investments.

Costs and taxes

Returns are quoted before costs, but you keep what's left after them:

Fees — broker commissions, fund management fees (a percentage skimmed every year), platform charges, currency-conversion spreads.
Taxes — most countries tax dividends, interest and realized gains; rules and rates vary a lot, and tax-advantaged accounts (pension schemes and similar) can shelter some of it.

A 1–2% yearly fee sounds small, but it compounds against you exactly the way returns compound for you. A cheap, boring fund often beats an expensive, exciting one purely on costs.

How the app measures all this

When you track your accounts here, the concepts above map directly onto what you see:

Each account or strategy becomes a portfolio, and the dashboard combines them into your net worth — see the Dashboard guide.
Realized vs unrealized P&L separates gains you've locked in from gains on paper — visible on each portfolio's detail page.
True return rates (XIRR, TWR) account for when money went in and out — a fairer measure than simple percentage change when you contribute over time.
Dividends, interest and rent show up as income entries and on the Income calendar.

Next: Types of investments walks through the common investment types one by one — and where each lives in the app.