Meaning of the acronym ARO
In options, the acronym ARO stands for Average rate option.
Short definition from the glossary of financial terms
An option whose payoff depends on the average of the underlying's value on a determined set of dates during the option's life.
The exercise type of an Asian option is usually European, but the specification of early exercise provisions based upon an average-to-date is possible.
Read the full definition of Asian-style option in the glossary of financial terms.