This is an active ETF that uses the S&P 500 as its benchmark but does not replicate the index. Sector and industry weights are matched to the index, and within those sectors, individual stock weights are set differently based on analyst research.

It suits investors who want core exposure to US large-cap stocks while seeking excess returns over the index.

It is an ETF managed by T. Rowe Price using an active management approach.

The fund keeps most of its net assets in US stocks and holds a low cash weighting. It matches sector and industry weights to the benchmark to reduce volatility from sector bets, and pursues excess returns by increasing the weights of stocks it judges promising within the same sector.

• A structure that matches sector weights to the index and differentiates only through stock selection
• Directly reflects analysis from the manager's in-house research analyst team

Assets under management (AUM) stand at $4.7B, and the expense ratio is 0.34% per year.

Its fees are higher than those of passive core ETFs, but in exchange you are buying the potential for performance that differs from the index.

Because it follows the overall movement of US large-cap stocks, it does not diverge greatly from the market's direction. However, since stock selection varies within each sector, the performance gap versus the index differs from year to year.

Inflows into active ETFs as a whole have continued. Still, the fund's asset base is relatively small compared with broad core ETFs, so it is wise to check trading volume and bid-ask spreads in advance.

Its strength is adding stock selection without straying far from the index thanks to its sector-neutral structure, while its higher fees compared with passive funds are a burden.

ITOT ETF and SCHB ETF in the table are low-cost index products that cover the entire US market, and IWV ETF is also a broad core fund based on the Russell 3000. OEF ETF narrows its focus to mega-cap stocks, and VXF ETF is a complement covering small and mid-caps excluding large caps, so their characteristics differ. Unlike these, this ETF charges a fee for stock selection. If you want pure index exposure, an S&P 500 product such as VOO, if you want equal weighting, RSP, and if you want to lean further toward large-cap growth, SCHG are also worth considering.

Before investing, the first step is to understand why this product is active and what you pay in return. Using the fact that the benchmark is the S&P 500 as your reference point makes comparison easier.

Even if sector weights are matched, poor stock selection can lead to underperformance versus the index. Because the fee difference accumulates every year, over a long holding period you need to check whether excess returns exceed the costs.

This structure suits investors who want to keep a US large-cap core while adding stock selection. If cost is the priority, a broad index product is the better fit, while this ETF is an option if you are willing to pay for research-based selection.