The previous lesson hinted at it: you control a large notional with a small deposit. That gap is leverage, and it’s the single most important thing to understand about derivatives.
A small deposit, a large position
To enter most derivatives you post only a fraction of the notional as margin — a good-faith deposit. So a few hundred dollars might control thousands of dollars of underlying. That’s leverage: your money is doing the work of a much larger sum.
It cuts both ways — hard
Leverage amplifies the percentage move on your deposit. Suppose $500 of margin controls $5,000 of notional (10× leverage):
- The underlying rises 10% → the position gains $500 → you’ve doubled your deposit.
- The underlying falls 10% → the position loses $500 → your deposit is wiped out.
A move that’s modest for the underlying is enormous relative to your stake. With high leverage, even a small adverse wobble can cost you everything you put in — and sometimes more than you put in, leaving you owing money.
Margin calls
If losses eat into your margin, the broker issues a margin call — a demand to top up your deposit immediately, or they close your position at a loss. Leverage means this can happen fast, often at the worst possible moment.
Powerful and dangerous
Leverage is why derivatives are so useful (a hedger can cover a big exposure cheaply) and so dangerous (a speculator can blow up an account on a small move). It’s the defining feature — respect it, size positions small, and never confuse the tiny deposit with the real risk you’re carrying.
The takeaway
Leverage lets a small margin deposit control a large position — magnifying gains and losses on your stake, with margin calls if it moves against you. It’s the source of derivatives’ power and their danger. (This is education, not investment advice — leveraged products carry a high risk of rapid loss.)