The fund tracks a low-volatility index built by selecting the roughly 100 S&P 500 constituents with the lowest volatility over the trailing 12 months. Unlike a standard S&P 500 index ETF, it picks stocks by volatility ranking rather than by market capitalization.

It suits conservative investors who value downside protection in falling markets and also want a steady dividend stream.

It is a passive ETF managed by Invesco that tracks an index.

Based on daily volatility over the prior 12 months, the index selects about 100 S&P 500 stocks in order of lowest volatility and allocates weights using inverse volatility weighting. Each quarter, the holdings and weights are readjusted according to the index committee's criteria.

• Stocks are selected by volatility, not market capitalization
• Relatively high weighting in defensive sectors such as utilities and consumer staples

Assets under management (AUM) stand at $7.5B, and the expense ratio is 0.25% per year.

Compared with USMV, FDLO, and LGLV, which use similar low-volatility strategies, the fund differs in fee level and methodology (S&P index-based versus factor model-based), so its detailed holdings and sector weights set it apart.

Given the nature of a low-volatility strategy, the fund has tended to rise somewhat less than the broader market in sharp rallies and to fall more gently during market corrections.

When uncertainty over interest rates and the economy comes to the fore, money tends to flow in on demand for defensive asset allocation. Its high utilities weighting also makes it sensitive to changes in the interest rate environment.

Its strengths are downside protection and stable dividends, while relative underperformance in rising markets and interest rate sensitivity are cited as weaknesses.

USMV, FDLO, and LGLV, shown in the table, are substitutes in the same low-volatility category that use factor model-based methodologies. XMLV is a product that extends exposure to mid-cap stocks, and VFMV is likewise an alternative minimum-volatility strategy. Beyond these, investors who want to compare against a core holding of the whole market can look at a standard S&P 500 index ETF such as VOO, and those who want a greater focus on dividends can consider a dividend growth ETF such as SCHD.

Here are the points to review before investing in SPLV. Although it is a strongly defensive product, it is worth confirming in advance its relative underperformance in rising markets and its sector concentration.

Concentration in defensive sectors such as utilities and interest rate sensitivity are the main sources of price swings, and in phases when the market rises strongly, performance may lag the market as a whole.

It is a suitable choice for conservative investors who prioritize downside protection and stable dividends. Those who also want to capture rising-market gains are advised to compare alternatives such as USMV and VOO.