Active Risk

What Does Active Risk Mean?
A type of risk that a fund or managed portfolio creates as it attempts to beat the returns of the benchmark against which it is compared. In theory, to generate a higher return than the benchmark, the manager is required to take on more risk. This risk is referred to as active risk.

Investopedia explains Active Risk
The more an active portfolio manager diverges from a stated benchmark, the higher the chances become that the returns of the fund could diverge from that benchmark as well. Passive managers who look to replicate an index as closely as possible usually provide the lowest levels of active risk, but this also limits the potential for market-beating returns.