This is a rule-based ETF that tracks the American Customer Satisfaction Investable Index. It holds US large-cap stocks, giving greater weight to companies with higher customer satisfaction scores derived from consumer surveys.

It suits investors who are interested in an alternative factor that differs from standard market-cap-weighted indexes and who want exposure to brand and customer experience themes.

It is a passively managed (index-tracking) ETF run by Exponential ETFs.

The fund selects US-listed companies and adjusts their weights based on scores that quantify customer satisfaction survey data. Unlike simple market-cap weighting, it takes a factor-based approach that builds an alternative metric, consumer ratings, into its inclusion rules.

• A rule-based design that reflects customer satisfaction data in both selection and weighting
• Alternative factor exposure that differs from standard market-cap-weighted indexes

Assets under management (AUM) stand at $117.0M, and the total expense ratio is 0.65% per year.

Its fee is somewhat higher than that of broad core ETFs, and trading liquidity may also be more limited than for large core products.

Because its holdings are spread across large-cap and mid-cap US consumer-related companies, the fund tends to move in a direction similar to the overall US equity market. However, factor-based selection can produce performance gaps versus market-cap-weighted indexes.

As with thematic and factor ETFs in general, fund flows are more volatile than for core index products, and inflows and outflows tend to vary with market interest in consumer and brand themes.

Its differentiated factor strategy is a strength, but the fee burden and the relatively limited size and liquidity are points to keep in mind.

If you want standard US large-cap core exposure, you can consider core ETFs such as VOO and IVV, which are broad products with lower fees. If you want to focus on the consumer sector, sector ETFs such as XLP (consumer staples) and XLY (consumer discretionary) are also candidates, and they offer exposure that partially overlaps with the consumer and brand theme of ACSI.

Here are the points to review before investing in ACSI. Since this product uses a distinctive customer satisfaction factor strategy, it is wise to check its cost burden, asset size and performance gap versus market-cap-weighted indexes in advance, and to define its role in your own portfolio.

A factor strategy can deliver results different from those of market-cap-weighted indexes, and the relatively limited size and liquidity can affect trading costs. Investors should also be mindful of swings across market phases that come from the concentration in the consumer theme.

It can be a distinctive option for investors who want alternative factor exposure that differs from standard core indexes. Given its cost and size, you could consider using it as a supplementary allocation within your portfolio.