A major risk is that you can lose more than your initial deposit.
Another is the risk of using leverage. Leverage can magnify gains, but it can also magnify losses which can exceed your initial deposit. Market volatility sometimes results in price moves that generate potential profits or losses in a short period.
Thirdly, Margin calls. When trading using leverage you must ensure the equity value of the account is always sufficient to cover the margin requirement of your open positions. The equity value is calculated as cash balance +/- PnL from open positions. If this dips below 100% of the margin requirement an account will be on a margin call. Failure to meet a margin call by adding more funds onto the account may result in positions being liquidated, to reduce exposure and to bring the margin requirement back below the equity value of the account. In the event of an adverse movement in fast-moving markets there may not be time to top up the account in between it going below 100% and hitting the liquidation level.
A good understanding of financial markets is a must for successful spread betting; otherwise, it’s easy to make mistakes.
Psychological stress is also another risk to be aware of. After realizing the potential for quick gains and losses, one can start to be influenced by emotions and make mistakes. Costs of spread betting, such as the spread or overnight charges, can reduce your total profit. Regulation changes could also influence trading and profitability.
Spread betting is different from traditional investments in that an investor is not entitled to the same dispersion law principle, making it speculative. Using stop-loss orders and only risking a small percentage of your account balance on each trade is a good practice.