Dynamic Rebalancing
Dynamic rebalancing is the process of continuously adjusting a portfolio to maintain a specific risk profile, such as delta neutrality, in response to changing market conditions. As the price of the underlying asset changes, the delta of the options in a portfolio shifts, moving the portfolio away from its target risk exposure.
To restore the target, the trader must buy or sell the underlying asset or other derivatives. The frequency and magnitude of this rebalancing depend on the gamma and theta of the options involved.
This process is essential for maintaining the integrity of complex hedging strategies and ensuring that risk limits are not breached. In high-frequency trading environments, this rebalancing happens automatically via algorithms, which can have a significant impact on short-term market microstructure.
It represents the practical application of risk management theory in a live, moving market environment.