What it means
Traditional mutual funds are bought and sold at the end of the day at the NAV, which is the total value of the fund's assets minus its liabilities, divided by the number of shares. Exchange-traded funds (ETFs) trade throughout the day at market prices that can drift slightly from NAV.
ETMFs sit between the two. ETMF shares trade on an exchange, and investors place orders during the day, but the price they pay is set after the market closes.
It is based on the fund's NAV plus or minus a stated adjustment, which is known as the premium or discount. This means investors know roughly what they will pay, yet the exact price is confirmed only when the NAV is calculated.
The main attraction for fund managers was confidentiality. Active managers do not want competitors to copy their trades, so they prefer not to publish holdings every day.
Because the ETMF price is tied to NAV, there is less risk that traders can exploit that information, and the structure may allow holdings to be disclosed less often. For investors, the potential benefits were tax efficiency, similar to some ETFs, and access to active strategies in an exchange-traded wrapper.
The drawback is that they cannot know the exact price when they place an order, and the investor base was small. Because few brokers supported the product, the range of funds stayed narrow.
In practice, the structure never gained wide adoption, and the best-known range was later withdrawn. Fully transparent and semi-transparent active ETFs have become the more common route for managers wanting an active strategy on an exchange.
The ETMF remains a useful example of how product design tries to balance transparency, cost and tradability.
In practice
Real-world examples.
Example
An active bond manager wants to offer a fund on a stock exchange but does not wish to publish holdings every morning. She chooses a structure where the price is linked to NAV. Investors can buy through a normal brokerage account, and the manager keeps her trading ideas private.
Example
A retail investor places an order for 500 shares during the afternoon. The broker confirms that the price will be NAV plus 0.15%. After the close, the fund calculates its NAV and the order is filled at the confirmed level.
Example
A financial adviser compares an ETMF with an actively managed ETF and a traditional mutual fund. She notes that the ETMF price is certain only after the close. She recommends the product that her client's broker supports and that has the lowest total cost.
Formula
Calculation
NAV per share = (Total assets - Total liabilities) / Number of shares
Trade price = NAV per share x (1 + Premium or discount)
Suppose a fund has total assets of $210,000,000 and liabilities of $10,000,000, with 10,000,000 shares in issue. NAV per share = ($210,000,000 - $10,000,000) / 10,000,000 = $20.00.
An investor places an order to buy at NAV plus 0.10%. After the close, the trade price is $20.00 x 1.001 = $20.02.
If the investor buys 1,000 shares, the cost is 1,000 x $20.02 = $20,020, which is $20 more than buying at exactly NAV.Case study
Seen in the real world.
Westbrook Asset Management is a fictional firm that wanted to bring an active equity strategy to exchange-listed investors. Its portfolio managers were concerned that daily disclosure of holdings would allow others to front-run their trades.
The firm looked at ETMF-style pricing, which would let investors trade during the day at a price tied to NAV. The product team found that few brokers could handle the order types, and the potential investor base was therefore small.
In this illustrative case, Westbrook decided to launch a semi-transparent active ETF instead, which has wider broker support. The team recorded the lesson that a clever structure is not enough: distribution, platform support and investor familiarity are just as important.
Watch out
Common mistakes.
- Assuming an ETMF trades at live market prices like an ETF, when its price is set relative to NAV after the close.
- Thinking that confidentiality of holdings removes all risk, when investors still face market risk and manager risk.
- Believing the structure is common, when it has had limited adoption.
Questions
People also ask.
How is an ETMF different from a mutual fund?
Shares trade on an exchange during the day, while a mutual fund is bought directly from the fund company at the end-of-day NAV.
How is it different from an ETF?
An ETF trades at a market price throughout the day, whereas an ETMF trade is priced off NAV after the close.
Why did managers like the idea?
It could protect a manager's trading strategy by reducing the need to publish holdings daily, while still giving investors an exchange-traded product.
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