Aggregate Risk
The meaning of aggregate risk may differ depending on the context. Generally it pertains to the overall exposure an investor faces across all currency pairs and instruments in which they have open positions.
Furthermore, aggregate risk encompasses the risks that an investor may encounter in present, or spot rates, as well as future rates, or forward rates.
When an investor holds a position in USD JPY, and EUR, in their portfolio the aggregate risk refers to the potential fluctuations that these currencies may experience due to market changes.