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  1. Portfolio Construction Content Hub
  2. Debunking Five Common ETF Myths
Portfolio Construction Content Hub
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Debunking Five Common ETF Myths

Special to VettaFiOct 15, 2025
2025-10-15

By Jamie Harrison, MFS Head of ETF Capital Markets Trading

Despite the popularity of ETFs, common misperceptions about them exist. Explore what is fact versus fiction.

Exchange-traded funds have been around for decades and are a popular vehicle choice. However, there are some common misperceptions about ETFs. We believe it’s important to dispel these common myths because investment vehicle choice and the benefits that ETFs can offer matter when building a portfolio.

Myth: Active ETFs Are Difficult and More Expensive to Trade.

Fact: Active ETFs are as easily traded as passive ETFs.

Active ETFs leverage the same ecosystem of institutional liquidity providers as passive ETFs. These liquidity providers utilize powerful technology to enhance price discovery and tradability in both active and passive ETFs. In most cases, executing an ETF trade should be a quick and efficient experience.


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Myth: ETFs Have High Spreads.

Fact: ETF spreads reflect the cost of acquiring the portfolio.

Spreads in ETFs often reflect the underlying liquidity of the securities they track. For ETFs that focus on highly liquid assets, such as large-cap equities, spreads are typically very narrow. Conversely, ETFs that track less liquid markets, such as emerging markets or niche sectors, may have wider spreads, but this mirrors the costs and risks of trading the underlying securities. Generally, investors should be prepared to pay the offer price when buying an ETF and accept the bid price when selling it.

Myth: The Last Price for an ETF Reflects Its Current Value.

Fact: The last price of an ETF is just that – the last price.

The price an investor pays for an ETF is determined by the value of its underlying securities at the point of sale. If an ETF doesn’t trade frequently, the value of the portfolio may have substantial movement between executed trades. In that scenario, using the last price could be an irrelevant benchmark of the ETF’s fair value. The real-time value of an ETF is the price at which an investor can buy or sell, which is reflected in the ETF’s bid/ask spread.

Myth: Active ETFs Are Difficult and More Expensive to Trade.

Fact: Active ETFs are as easily traded as passive ETFs.

Active ETFs leverage the same ecosystem of institutional liquidity providers as passive ETFs. These liquidity providers utilize powerful technology to enhance price discovery and tradability in both active and passive ETFs. In most cases, executing an ETF trade should be a quick and efficient experience.

Myth: ETFs Are Only for Short-Term Trading and Market Timing.

Fact: ETFs are versatile and can be used across a wide spectrum of time horizons.

ETFs offer investors exposure to a variety of asset classes and investment strategies and can be used to meet a variety of investment goals both short and long term. Investors should evaluate ETFs on a case-by-case basis when determining the suitability of a particular product for their portfolio and associated time horizon.

Conclusion

ETFs have come a long way since their beginning more than three decades ago. While the first ETFs were known for their low expenses and passive exposure to broad markets, ETFs now encompass a wide range of styles and asset classes, offering more choice to investors. Whether for hedging, short-term trading or long-term appreciation, ETFs are a highly accessible option for investors of all types.

Originally published on MFS.com.

For more news, information, and analysis, visit the Portfolio Construction Content Hub.

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