Average daily trading volume (ADTV) - Financial definition
Concise definition of the term average daily trading volume
The ADTV represents the amount of individual securities traded in a day on average over a specified period of time on a given market.
Comprehensive definition of the term average daily trading volume
When a security's ADTV is subject to big changes, there is generally some news or event that has affected the market's perception of the security.
Usually, a higher ADTV means that a security is more attractive, because higher volumes tend to lead to narrower bid-ask spreads and lower volatility.