Options Rho - Definition
Options Rho measures the sensitivity of a stock option's price to a change in interest rates.


Options Rho Explained
Rho is the most insignificant of all the Options Greeks due to the fact that not only does a single 1% change in interest rate not affect change the price of the option much according to its rho value, such a 1% change in interest rate rarely happen as well. Even if there is such a dramatic change in interest rate, the change in price due to rho value would be negligible compared to the change in price due to delta caused by a correspondingly big move in the underlying stock.