ETF Portfolio Turnover Ratio: What It Measures and Where to Find It

An ETF portfolio turnover ratio measures how much trading a fund did relative to the value of the securities it held. If an ETF reports 30% turnover, the smaller of its eligible purchases or sales came to 30% of its average eligible portfolio value for the reporting period. You can usually find the figure under “Portfolio Turnover” near the fee table in a U.S. ETF’s summary prospectus.

How to calculate the ETF portfolio turnover ratio

The SEC’s Form N-1A instructions use the smaller dollar amount of eligible purchases or sales for the fiscal year. Divide that amount by the monthly average value of the eligible portfolio securities and multiply by 100 to express it as a percentage.

Suppose an ETF made $42 million in eligible purchases and $30 million in eligible sales and averaged $100 million in eligible holdings. Its turnover rate is $30 million ÷ $100 million = 30%. Adding buys and sells would give 72%, a different measure of trading activity.

The denominator uses portfolio values sampled across the year, so a year-end holdings total can give you a different answer. The SEC instructions also exclude securities whose maturity or expiration was one year or less at acquisition from both sides of the calculation. Read the fund’s footnotes for other exclusions. Some ETFs exclude securities they receive or deliver in kind when they create or redeem shares. SEC-filed prospectus example

What does turnover above 100% mean?

A hypothetical fund with $125 million in eligible buys, $120 million in eligible sales, and $100 million in average eligible holdings reports 120% turnover. Both sides of its eligible trading exceeded its average holdings value. It could have traded part of the portfolio several times while leaving other positions alone. The ratio counts dollars, so you need holdings records or trade disclosures to learn which positions changed.

You can see a real example in the December 2022 summary prospectus for the Invesco S&P 500 Momentum ETF. The fund reported 124% turnover for its most recent fiscal year at the time. Farther down, under “Portfolio Turnover Risk,” the issuer explains that changes to the underlying index can lead to frequent trading. The 124% figure belongs to that filing period.

Where to find turnover and compare two ETFs

1. Start with the ticker. On the issuer’s fund page, open the summary prospectus for the ETF you want to examine. Search for “portfolio turnover.” A prospectus can cover several funds, so confirm the fund name before taking down the number.
2. Write down the period. Look for the fiscal year end and any note about a partial first year. For a longer view, check the full prospectus’s Financial Highlights table and its footnotes. A 20% reading for six months and a 20% reading for a full year describe different periods.
3. Read the strategy beside the number. Check the benchmark or investment objective for each ETF. A fund that tracks a broad market and a fund that selects stocks by momentum have different reasons to trade. If turnover jumps from one year to the next, check the fund’s Statement of Additional Information for an explanation.

For the rest of that comparison, use the ETF factsheet guide to line up the funds’ objectives, benchmarks, and holdings.

Portfolio turnover vs expense ratio

The expense ratio expresses annual operating expenses as a percentage of fund assets. A 0.20% expense ratio and a 30% turnover rate describe different quantities. The first is an operating cost ratio. The second measures eligible trading activity. The SEC’s prospectus instructions discuss trading costs, such as commissions, separately from annual operating expenses. The turnover figure alone gives you too little information to calculate those costs. SEC Form N-1A

A high turnover figure can prompt a check of the fund’s capital gains distribution history. What the fund distributes depends on more than how much it trades. For example, in-kind exchanges can help an ETF limit realized gains, and ETF shareholders can still receive capital gains distributions. The issuer’s distribution history answers what the fund paid out in prior years. Investor.gov bulletin on mutual funds and ETFs

What an ETF price chart can tell you

After checking the prospectuses, you can put two available ETF tickers in Compare Stocks and ETFs and look at their historical close prices over the same dates. If one ETF lagged, the chart alone cannot tell you how much came from the fund’s trading costs, its choice of holdings, or other factors. To compare each fund with its own index, read the issuer’s performance table and match the dates and return conventions. The tracking difference guide explains how to read that gap.

Equity Replay is an educational historical simulator. It uses historical close prices and excludes dividend reinvestment, fees, and taxes from its replay calculation. It provides neither investment advice nor brokerage services or a record of actual trades.