What Is Leverage?

Amplifies gains. Amplifies losses equally. Without mercy

6 min read Intermediate

"Leverage lets you control a position larger than your capital. A 10x leveraged position means a 10% move against you wipes out your entire stake. This chapter explains the mechanics, the costs, and why leverage destroys most retail accounts."

For educational purposes only. Nothing in this chapter is financial advice. All figures are illustrative examples. Tax rules, account types, contribution limits, and regulations differ by country and change over time. Always verify current rules with official government sources or a qualified financial adviser before making any investment decisions.

What Leverage Is

Leverage means controlling a position larger than the capital you deposit. A 10:1 leverage ratio means £1,000 controls a £10,000 position. A 1% move on that position is a 10% move on your capital — in either direction.

Leverage amplifies returns when you are right. It amplifies losses — equally, symmetrically, without mercy — when you are wrong. It does not tilt the odds in your favour. It magnifies whatever outcome would have occurred anyway.

The Maths

£1,000 deposit, 10:1 leverage (£10,000 position)

Asset rises 5% +£500 (+50% on your £1,000)

Asset rises 10% +£1,000 (+100% — doubled your money)

Asset falls 5% −£500 (−50% — lost half your deposit)

Asset falls 10% −£1,000 (−100% — full deposit gone)

Asset falls 11% −£1,100 (−110% — you owe more than you deposited*)

*FCA-regulated retail CFD brokers must offer negative balance protection — you cannot lose more than your deposit. Professional clients and some overseas brokers do not provide this.

Margin Calls

When a leveraged position moves against you and your account equity falls below the maintenance margin requirement, the broker issues a margin call. You must either deposit more funds or your positions are automatically closed — at a loss, at the current market price, which is often at the worst possible moment.

Margin calls are how leveraged investors lose more than they intended. The position is closed before they can wait for a recovery. Unleveraged investors can simply hold through a downturn. Leveraged investors may not get that option.

FAQs

Is any leverage acceptable?

Conservative use of leverage — e.g. a mortgage to buy a property — is normal and widely used. Financial leverage in investing is different: positions can move against you instantly, margin calls can come at the worst time, and the cost of borrowing (overnight fees) compounds.

What leverage do FCA-regulated brokers offer retail clients?

Maximum 30:1 on major forex pairs, 20:1 on major indices, 10:1 on commodities, 5:1 on individual equities, 2:1 on crypto. These caps were introduced by ESMA/FCA after research showed higher leverage correlated with higher retail losses.

Do index ETFs use leverage?

Standard index ETFs do not. However, leveraged ETFs (e.g. 2x or 3x ETFs) exist and are available to retail investors. These rebalance daily, which causes significant return decay over time — they are not suitable for long-term holding.

Is leverage used in my pension?

Defined benefit pension funds sometimes use interest rate swaps and other derivatives. These made headlines in the 2022 UK gilt crisis when LDI (Liability-Driven Investment) strategies amplified the bond market selloff.

Key takeaways

Leverage controls a position larger than your deposit — amplifying both gains and losses equally.
At 10:1 leverage, a 10% adverse move wipes out your entire deposit.
Margin calls force position closure at the worst moment — before a recovery is possible.
FCA caps retail leverage: 30:1 forex, 5:1 equities, 2:1 crypto.
Leveraged ETFs decay over time due to daily rebalancing — not suitable for long-term holding.