The fund tracks an index of large- and mid-cap developed-market stocks outside the US, with security weights adjusted by scores on four factors: value, momentum, quality and low volatility. The index is reconstituted and rebalanced every quarter.

It suits long-term diversified investors who want to reduce their US concentration and gain low-cost exposure to developed-market stocks abroad.

It is a passive (index-tracking) ETF managed by Goldman Sachs Asset Management.

The four factor scores are combined to adjust each security's weight away from pure market-cap weighting. Rather than leaning on any single factor, the design blends them evenly to reduce performance swings from factor rotation, and it diversifies broadly across regions and sectors.

• An even blend of four factors eases concentration in any single factor
• A core-style portfolio covering developed markets outside the US
• Quarterly reconstitution refreshes factor scores on a regular schedule

Assets under management (AUM) stand at $5.9B, and the total expense ratio (Expense Ratio) is 0.25% per year.

Among core developed-market ETFs, its fee burden is on the low side. Even with the factor adjustments, it follows an index, so operating costs do not rise significantly.

Performance depends heavily on whether the dollar is strengthening and on how European and Japanese equities are trading. There are periods when it moves differently from US large caps, so it sometimes serves to cushion the volatility of a US-centered portfolio.

When concerns about US valuations come to the fore, demand for overseas diversification grows, and money tends to shift toward international equity ETFs as a group. Conversely, when US stocks lead the market, interest fades quickly.

Its strengths are a low fee and factor diversification, while its weakness is full exposure to currency moves and regional economic slowdowns.

Among the funds shown alongside it in the table, the FNDF ETF is a developed-market product that sets weights using fundamental measures, and the INTF ETF is similar in character because it is factor-based. IGF, GUNR and GNR are thematic products holding infrastructure and natural resources, so their underlying holdings differ, and they are best used only as a reference for comparing fee levels and fund size. Alternatives not in the table include low-fee products that track a broad developed-market index directly, such as IEFA, VEA, IDEV and SPDW. To extend exposure to emerging markets as well, VXUS is also worth considering.

These are the items to check before buying this ETF. It is a reasonable construction for a core developed-market holding, but it is wise to understand in advance the costs, the currency exposure and the performance gaps that factor adjustments create.

Currency moves and the overseas economic outlook are the main drivers of short-term volatility. Factor adjustments do not always work in an investor's favor, so you need to accept periods when performance diverges from a market-cap index.

It is worth considering as a core overseas holding that reduces US concentration. If simple index exposure is the goal, choose a product such as IEFA or VEA, and if you want factor adjustments, this ETF is the one to pick.