Greeks-based hedging is a quantitative strategy for managing the risk of an options portfolio by dynamically adjusting positions in the underlying asset or other derivatives. This technique aims to maintain a specific risk profile, often delta-neutral, by counteracting the sensitivities of the options. The core objective is to insulate the portfolio from small movements in the underlying price, time decay, or volatility changes. Effective hedging requires continuous monitoring and rebalancing as market conditions evolve.
Calculation
The strategy relies on calculating the options Greeks—delta, gamma, theta, and vega—which quantify the sensitivity of an option’s price to various market factors. Delta measures price sensitivity to the underlying asset’s price change, while gamma measures the rate of change in delta. These calculations enable traders to understand how their portfolio’s risk profile will change given anticipated market movements.
Adjustment
Hedging adjustments are executed to maintain risk neutrality by offsetting the changes identified by the Greeks. Delta hedging involves rebalancing the underlying position to keep the overall portfolio delta near zero. For example, if a long call option’s delta increases, a delta-hedger sells a portion of the underlying asset to bring the portfolio back to neutral. This dynamic rebalancing process minimizes directional exposure and preserves the value of the option’s premium components.
