Most traders think they understand spread betting until they sit down and try to explain it to someone else. The moment they attempt to describe why they never actually own the underlying asset, or why their profit is calculated in pounds per point rather than a share price movement, the gaps in their understanding become obvious fast.
Spread betting is a derivative product — meaning you speculate on price movements without owning the underlying instrument. A provider quotes two prices: the buy price (ask) and the sell price (bid). The gap between them is the spread, and that gap is how the provider earns revenue. Every trade starts slightly offside because you enter at the ask and exit at the bid.
Here is where the numbers make it concrete. Say the FTSE 100 is quoted at 7,500 bid / 7,502 ask. A trader goes long at 7,502, staking £5 per point. The index rises to 7,540 bid / 7,542 ask, and the trader closes. The move was 38 points (7,540 minus 7,502). Profit: 38 × £5 = £190. That two-point spread cost the trader £10 on entry — something many beginners forget to account for.
The leverage dimension is what separates spread betting from simply buying shares. A provider might require only £500 margin to control a £10,000 position. That magnifies both outcomes equally. Traders who want to go deeper on the mechanics can read the full breakdown on spread betting at Investopedia, explore how spread betting developed historically on Wikipedia, or study margin concepts further via Investopedia's margin explainer.
The spread is not a footnote — it is the first cost every trade pays before a single point moves in your favour.
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