This is a passive ETF managed by BlackRock iShares that tracks the MSCI ACWI ex USA IMI Index, a broad index of non-US stocks. It automatically holds large-, mid-, and small-cap stocks across developed and emerging markets outside the US, weighted by market capitalization.

It suits long-term investors who want broad global diversification outside the US and prefer a unified asset allocation built on the iShares Core lineup.

It is an ETF managed passively, meaning it tracks an index.

The fund holds large-, mid-, and small-cap stocks included in the broad MSCI index of global markets excluding the US, weighted by market capitalization. Its exposure is very similar to VXUS in the same category, but it differs in that it tracks an MSCI index rather than an FTSE index.

• Tracks the MSCI index of global stocks excluding the US
• Combined exposure to developed markets, emerging markets, and small caps
• Ultra-low expense ratio of the iShares Core lineup

Assets under management (AUM) stand at $57.8B, and the expense ratio is 0.07% per year.

In the table, VEA, IEFA, and EFA are variants with developed-market exposure only, VXUS is a direct substitute in the same category that tracks an FTSE index, and VT is a variant with global exposure that includes the US. IXUS stands out for its MSCI-based classification and its fit with the iShares lineup.

The fund has shown somewhat higher volatility than the US market, and because of its emerging-market weighting, volatility has partly widened during cycles of rising US interest rates and a strong dollar.

It belongs to the group of mega-sized global ETFs that attract both global diversification demand and capital from investors standardizing on the iShares lineup. Inflows can become especially noticeable when concerns about US market valuations come to the fore.

Its main strengths are an ultra-low expense ratio and broad global diversification outside the US, while emerging-market volatility and multi-currency exposure are drawbacks to consider in advance.

In the table, VXUS is a direct substitute that tracks an FTSE index, VEA, IEFA, and EFA are variants with developed-market exposure only, and VT is a globally diversified ETF that includes the US. To add emerging markets separately, you can consider VWO or IEMG, and for a concentrated US core holding, variants such as VOO, IVV, and VTI can also be reviewed together.

Here are the points to review before investing in IXUS. Broad global diversification outside the US is its strength, but multi-currency exposure, emerging-market volatility, and the absence of US stocks are worth double-checking before buying, along with the weighting of any combination with US ETFs.

Multi-currency exposure, emerging-market currency and policy risk, and the absence of US stocks are the main drivers of short-term volatility and diversification limits. Investors who want a global core allocation should also consider combining it with VT or a US ETF.

It is regarded as a standard choice for a core holding with broad global diversification outside the US. For FTSE tracking, VXUS is the fitting variant; for single-fund exposure that includes the US, VT; for developed markets only, VEA or IEFA; and for a separate emerging-market add-on, VWO or IEMG.