What is Active Share?
Active Share
Active Share is a measure of how much a portfolio's holdings differ from a benchmark index. It shows the percentage of portfolio holdings that are not found in the benchmark, indicating the level of active management.
Overview
Active Share is a financial metric that helps investors understand how actively a fund manager is managing a portfolio compared to a benchmark index. It is calculated by taking the sum of the absolute differences between the weights of the portfolio and the benchmark for each stock held. For example, if a fund holds stocks that are not in the benchmark or holds them in different proportions, it will have a higher Active Share, indicating a more aggressive investment strategy. This metric matters because it can give investors insight into the potential for outperformance or underperformance compared to the benchmark. A high Active Share suggests that the fund manager is making significant bets on certain stocks, which could lead to higher returns if those bets pay off. Conversely, a low Active Share may indicate that the fund is closely tracking the benchmark, which could limit potential gains but also reduce risk. Consider a mutual fund that has an Active Share of 80%. This means that 80% of its holdings are different from those in the benchmark index. If the benchmark index performs well, the fund may outperform due to its unique holdings. However, if the benchmark declines, the fund could also suffer greater losses. This illustrates how Active Share can be a useful tool for investors looking to understand the risk and return profile of their investments.