Portfolio Turnover

The rate at which an investment fund replaces its portfolio holdings over a given year, expressed as a percentage.

Portfolio turnover measures how frequently an investment fund's management buys and sells securities within the portfolio over a 12-month period. It is calculated by taking the lesser of total purchases or total sales of securities during the year and dividing that figure by the fund's average net assets. A turnover rate of 100% implies that, on average, the equivalent of the entire portfolio has been replaced over the course of the year, whereas a low turnover rate indicates a buy-and-hold strategy. For retail investors, portfolio turnover is a critical indicator of hidden costs and tax efficiency. High turnover rates generate substantial transaction costs, such as brokerage commissions, bid-ask spreads, and market impact costs, which are paid out of fund assets and drag down overall performance. Additionally, in taxable accounts, frequent trading triggers capital gains taxes that are passed directly to the investor as taxable distributions. Generally, passive index funds and exchange-traded funds exhibit very low turnover because they only trade when their underlying index changes. Conversely, actively managed funds tend to have higher turnover as managers attempt to capitalize on short-term market opportunities. When evaluating funds, investors should compare turnover rates within the same category, as a high-turnover strategy requires a significantly higher rate of return to offset its associated transaction costs and tax liabilities.

An equity mutual fund has average net assets of $50,000,000 over the year. During this period, the fund manager purchases $15,000,000 in new stocks and sells $10,000,000 of existing holdings. To calculate the turnover rate, we take the lesser of the two transaction values ($10,000,000) and divide it by the average net assets: $10,000,000 / $50,000,000 = 0.20, or a 20% portfolio turnover rate.