Portfolio Delta Rebalancing
Portfolio delta rebalancing is the systematic process of adjusting the positions within a portfolio to maintain a target delta, typically zero for delta-neutral strategies. Because the delta of an option changes as the underlying asset's price moves, a portfolio that is delta-neutral at one moment will quickly become exposed to directional risk as the market fluctuates.
Rebalancing involves buying or selling the underlying asset or other derivatives to return the net delta to the desired level. This process is crucial for risk management but incurs transaction costs and potential slippage, which can erode the profitability of the strategy.
Automated systems are often used to execute rebalancing at specific delta thresholds or time intervals to minimize manual intervention and ensure consistent risk exposure.