Why ETF Spreads Often Mislead Investors

ETF Spreads Reflect the Underlying Portfolio

In many ways, an ETF spread is simply the cost of gaining exposure to a diversified basket of securities, strategies, or asset classes through a single trade.

A broad basket of 20 highly liquid large cap U.S. equities should not be expected to trade the same way as a multi asset ETF holding less liquid bonds, options, international securities, or more complex exposures. The underlying portfolio matters.

In fact, if many investors attempted to build some of these portfolios themselves in a personal brokerage account, particularly those involving fixed income, options, or less liquid securities, they would likely experience materially wider execution costs than the ETF market makers pricing the basket professionally.

The Most Misunderstood Concept in ETFs

One of the most misunderstood concepts in the ETF industry remains the bid ask spread. Investors often look at an ETF’s visible spread and immediately assume it represents a direct cost, a liquidity problem, or a flaw in the structure itself.

In reality, spreads are often a reflection of the liquidity, volatility, and trading characteristics of the underlying portfolio, not simply the ETF.

More importantly, many of the same trading frictions that investors criticize in ETFs also exist in traditional mutual funds.

The difference is that ETFs display these dynamics transparently in real time, while mutual fund costs are often embedded within the NAV and distributed across shareholders over time.

ETF Volume Does Not Equal Liquidity

A common misconception is that ETF trading volume alone determines liquidity. While volume can be helpful, the liquidity of the underlying securities inside the ETF is often far more important. An ETF holding highly liquid large cap U.S. equities may trade efficiently even with relatively modest daily volume, while an ETF holding small cap equities, high yield bonds, options, emerging markets, or less liquid securities may naturally trade with wider spreads because the underlying portfolio itself is more difficult and costly to hedge and trade.

How Market Makers Actually Price ETFs

This is where understanding how market makers operate becomes important. Market makers are not simply pricing the ETF ticker on a screen. They are evaluating the liquidity and risk of the entire underlying basket. That includes hedge costs, volatility, financing, options pricing, bond liquidity, foreign market hours, settlement risk, and inventory exposure. In many cases, wider spreads are not a sign of a broken product, they are an honest reflection of the actual trading environment of the underlying assets.

Options and Fair Value Complexity

Options provide another good example. Investors may see a visible bid and ask in the market, but experienced options traders understand there is often a fair value somewhere in between. Different firms may value options differently depending on volatility assumptions, skew, hedging costs, positioning, or market outlook. During periods of elevated volatility, those differences can widen materially. ETFs holding options or more complex strategies are often reflecting these same real world pricing dynamics intraday, while similar valuation challenges may exist in other investment structures without being as visible to investors.

Mutual Funds Face the Same Trading Frictions

Ironically, many investors criticizing ETF spreads overlook the fact that traditional mutual funds also incur trading spreads, market impact, and liquidity costs whenever portfolio managers buy or sell securities. Mutual funds still need to enter and exit positions. Bonds still trade with bid ask spreads. Options still widen during periods of volatility. Pricing services still make assumptions around fair value. Those trading costs do not disappear simply because investors do not see them displayed intraday on an exchange.

The Fixed Income Valuation Challenge

In fixed income funds especially, pricing becomes even more nuanced. Many bonds do not trade continuously throughout the day, meaning valuations are often derived from evaluated pricing services, matrix pricing, or fair value assumptions rather than immediately executable market levels. During periods of market stress, traders may know that actual executable prices differ materially from where certain securities are marked. Similar issues can arise in option based strategies, where volatility spikes and widening option spreads can create significant differences between theoretical values, last traded prices, and actual executable levels.

ETFs simply expose much of this reality more transparently.

ETFs as a Source of Liquidity and Price Discovery

As ETFs mature, they can also become an additional source of liquidity and price discovery for the underlying market itself. In some cases, ETFs may ultimately trade significantly more volume than many of the underlying securities they hold, particularly in fixed income, international markets, or specialized sectors. Investors and institutions often utilize ETFs precisely because they can provide a more efficient and liquid vehicle for gaining or hedging exposure.

Through the creation and redemption process, along with competition between market makers and APs, ETFs can introduce an additional layer of secondary market liquidity beyond what may initially appear visible on screen. Over time, this can help improve execution efficiency and reduce trading friction for investors, particularly when orders are handled properly through limit orders, RFQ systems, or ETF block trading desks.

Competition Often Improves ETF Pricing

In fact, one could argue that ETFs often create a more competitive and efficient trading environment when handled properly. ETF orders can be exposed to multiple market makers, APs, block desks, and liquidity providers simultaneously. Competition between firms can improve pricing and reduce market impact, especially for larger or more complex trades. In some cases, a market maker may already hold the opposite position or desire inventory exposure, allowing investors to achieve executions that may actually compare favorably to the implied trading costs of the underlying basket itself.

Mutual funds, by contrast, generally centralize execution through a single portfolio trading process. The resulting transaction costs, spreads, and market impact ultimately become embedded within the portfolio and shared across shareholders.

The Tax Efficiency Advantage

Taxes also play a significant role in the conversation. In traditional mutual funds, shareholders can be impacted by taxable events generated by the activity of other investors. Large redemptions may force managers to sell appreciated securities, potentially creating capital gains distributions for all shareholders, even those who never sold their own position. ETFs, through their in kind creation and redemption process, have historically provided a more tax efficient structure where investors generally recognize taxable gains primarily when they choose to sell their own shares.

Execution Still Matters

This does not mean all ETFs are automatically cheap to trade or that spreads should be ignored. Specialized, less liquid, or highly volatile ETFs may naturally trade wider than broad market products, and investors should understand what they own. Timing, order type, and execution strategy still matter greatly. Avoiding market orders, particularly near the open and close when underlying markets are going through opening and closing rotations, can materially improve outcomes for investors.

Transparency Is Not the Same as Cost

ETF spreads are visible. That visibility often causes investors to focus heavily on them while overlooking the less visible trading frictions, valuation assumptions, tax consequences, and execution costs that may exist within other investment structures.

In many ways, ETFs are not exposing a new problem. They are simply making market realities more transparent.

Disclaimer

Please note this article is for information purposes only and does not in any way constitute investment advice. It is essential that you seek advice from a registered financial professional prior to making any investment decision.