This ETF offers exposure to global equity markets outside of the U.S., including stocks listed in more than a dozen emerging and developed markets. As such, ACWX can be useful as a core component of long-term portfolios, though those seeking to fine-tune the balance between developed and emerging markets may wish to utilize more targeted options (ACWX is tilted heavily towards developed markets). This fund could also be useful in a long/short trade for investors seeking to capture return differentials between U.S. markets and international stocks. The balance of exposure offered by this ETF is impressive; nearly 1,000 securities are spread across different countries and sectors, giving this fund a minimal amount of concentration risk. The expense ratio is also impressive, making this ETF appealing to cost-conscious investors. Other alternatives offering similar exposure include Vanguard's VEU (which is even cheaper and offers considerably more depth of exposure). VSS could potentially be a nice complement, adding small cap exposure to the large cap-heavy ACWX.