CFDs are complex financial instruments and carry a high level of risk due to leverage. A significant proportion of retail investors incur losses when trading leveraged products such as CFDs. You should carefully consider whether you understand how CFDs work and whether you can afford to take the high risk of losing your capital.
If you’re wondering what delta means, it’s the measure that indicates how much the price of an option changes when the price of the underlying asset moves by one point. It’s one of the five “Greeks” (delta, gamma, theta, vega, rho) that options traders use to assess the risk and behavior of their positions.
The delta of a call option is positive (between 0 and 1). If the stock rises by $1, the call option rises by the proportion indicated by its delta. A call with a delta of 0.60 rises by $0.60 for every dollar the underlying asset rises.
The delta of a put option is negative (between -1 and 0). If the stock rises by $1, the put loses value. A put with a delta of -0.40 falls by $0.40 for every dollar the underlying asset rises. When the underlying asset falls, the put gains value in the same inverse proportion.
Beyond price, delta approximates the probability that the option will be in the money at expiration. A call with a delta of 0.70 has approximately a 70% probability of expiring in the money. This interpretation is not exact, but it guides the trader in choosing strike prices.
Traders use delta to measure their portfolio’s exposure to movements in the underlying asset.
Check the delta for each option. The platform displays it in the options chain next to each strike.
Multiply by the position size. If you hold 10 contracts of a call option with a delta of 0.50, your exposure is equivalent to 500 shares of the underlying asset.
Add up positions. The portfolio’s total delta indicates how much you gain or lose for every 1-point move in the asset.
Adjust if necessary. Adding positions with an opposite delta reduces total exposure (bringing you closer to delta-neutral).
A delta-neutral portfolio neither gains nor loses from small movements in the underlying asset. It requires constant adjustments and is recommended only for advanced traders.
A trader buys a call option on a stock trading at $100 with a strike price of 105 and a delta of 0.45. If the stock rises to $102 (2 points), the option increases in value by approximately $0.90 (2 × 0.45). If the stock falls to $98, the option loses $0.90. The delta told you in advance how much your position would move for each point in the underlying asset.
The delta changes constantly, which can be confusing for beginners.
Assuming that the delta remains fixed throughout the option’s life.
Failing to recalculate your exposure when the price of the underlying asset moves.
Ignoring gamma (which measures how much the delta changes per point).
Mastering delta offers direct advantages when trading options.
Estimating how much your position will move in response to changes in the underlying asset.
Measuring the total exposure of an options portfolio.
Choosing strike prices based on the approximate probability of the option expiring in the money.
Delta quantifies the sensitivity of an option’s price to movements in the underlying asset. It is positive for calls and negative for puts, and it changes with price and time. Checking it before opening any options position is a basic step in risk management.