Rho Risk

Rho measures the sensitivity of an option's price to changes in the risk-free interest rate. While rho is generally the least significant of the Greeks for short-term options, it becomes more important for long-dated options or in environments with rapidly changing interest rates.

An increase in interest rates generally makes call options more expensive and put options cheaper, as the cost of carry for the underlying asset changes. In the context of digital assets, rho can be complex due to the existence of staking yields and decentralized lending rates that differ from traditional risk-free rates.

Traders who hold long-term positions or deep-in-the-money options must account for interest rate changes to ensure their pricing models remain accurate. It is a subtle but necessary component of comprehensive risk assessment.