Portfolio Turnover Ratio (Mutual Funds)
The portfolio turnover ratio of a mutual fund measures how frequently the fund manager replaces the scheme's holdings over a one-year period, calculated as the lesser of total purchases or total sales divided by the average AUM, expressed as a percentage, with high turnover generally indicating higher transaction costs and potential tax drag.
Portfolio turnover ratio (PTR) is a measure of the fund manager's trading intensity. A PTR of 100% means that, on average, the entire portfolio was replaced once during the year. A PTR of 200% indicates the portfolio was turned over twice. A PTR of 20% suggests a very low-churn, buy-and-hold style. Indian mutual fund regulations require AMCs to disclose PTR in the scheme's annual report and it also appears in monthly factsheets.
High portfolio turnover has several cost implications. Each buy and sell transaction in the equity market incurs brokerage (even at institutional rates, meaningful on large volumes), securities transaction tax (STT), and market impact costs. These transaction costs are absorbed directly by the scheme's assets, not separately disclosed in the TER. Research by various domestic and international studies has shown that high-turnover funds tend to underperform low-turnover funds on a net-cost basis over long periods, even if their gross returns are comparable.
For tax purposes within the fund (not at the investor level), frequent trading at the fund level can create short-term capital gains within the portfolio that are taxable at higher rates, affecting net portfolio returns. This is separate from the investor-level tax event that occurs only on redemption.
Low-turnover funds (PTR below 30-40%) are typically associated with conviction-based portfolio styles where the fund manager holds positions for 3-5 years. Fund houses like DSP Mutual Fund and Parag Parikh Flexi Cap Fund (Franklin India Opportunities Fund in an earlier era) became known for lower-turnover approaches. High-turnover funds (PTR above 150-200%) may reflect a more opportunistic or sector-rotation style, which works in trending markets but may destroy value in choppy conditions.
For index funds and ETFs, PTR is structurally low (typically 10-30%) because changes to the portfolio occur only when the underlying index reconstitutes — usually semi-annually. This structural low churn is one of the silent advantages of passive investing that is often not highlighted in cost comparisons focused solely on expense ratios.