The benefits of international investing come down to four things: your portfolio becomes less dependent on any one country’s economy, you get direct exposure to growth happening outside the US, foreign holdings act as a partial hedge when the dollar weakens, and you can choose from thousands of companies that never appear on US exchanges. Those advantages come attached to foreign withholding taxes, extra IRS reporting, and one tax rule that can devour your gains if you buy the wrong kind of fund. Understanding both sides before you allocate matters.
What You Actually Gain
The most reliable benefit is diversification. Foreign markets, especially emerging ones, don’t move in lockstep with the S&P 500, so a domestic downturn doesn’t hit your entire portfolio at once. The effect has limits. Correlations between US and international markets have risen over the past two decades, and during genuine global crises nearly everything falls together. The benefit shows up most clearly during regional or country-specific disruptions, and over a full market cycle a blend of US and international equities tends to produce a better risk-adjusted return than either one alone.
Geographic spread also protects against country-specific systemic risk. A portfolio concentrated in one nation is exposed to that country’s political shifts, regulatory overhauls, and monetary policy decisions. Spreading capital across jurisdictions means no single government can devastate your entire investment base.
The second gain is access to growth that isn’t available domestically. Countries undergoing rapid industrialization and demographic expansion often deliver corporate revenue growth that mature economies can’t match. A company selling consumer goods into a rapidly expanding middle class has a structural tailwind no comparable US firm enjoys in a saturated market. The tradeoff is volatility: emerging market stocks swing harder in both directions, and political or currency crises can wipe out gains quickly, so these positions work best as a long-term allocation.
Developed foreign markets add a different flavor. Switzerland, the United Kingdom, and Japan host blue-chip corporations with reliable earnings and often higher dividend yields than their US counterparts. Some industries are geographically concentrated in ways that make international investing the only way to reach them directly, including specialized manufacturing in Germany, semiconductor fabrication in Taiwan, and resource extraction in Australia and South America.
Third, foreign holdings interact with the dollar in ways that can help you. When the dollar declines against foreign currencies, your international holdings become worth more when converted back to dollars, and the currency gain stacks on top of whatever the underlying investment earned. The same conditions that erode the purchasing power of your dollar-denominated assets tend to increase the dollar value of your foreign ones. The reverse also holds: a strengthening dollar reduces the value of foreign holdings when translated back to US currency, even if the underlying stocks performed well in local terms. The dollar’s sharp rally in the early 2020s significantly dragged on international fund returns for US investors. Currency-hedged ETFs use futures to neutralize exchange rate movements, at a cost built into the expense ratio and at the loss of any upside when the dollar weakens.
Fourth, the US market, despite its size, represents only a portion of global stock market capitalization. Staying domestic-only means ignoring thousands of publicly traded companies across dozens of countries, and it means you’re more likely to overpay for the ones you can access.
How to Get the Exposure
The practical mechanics have gotten dramatically easier. You no longer need a foreign brokerage account to get meaningful exposure.
International ETFs and Mutual Funds
The simplest route is a US-listed ETF or mutual fund that holds foreign stocks. Broad-based international funds cover dozens of countries in one holding, and more targeted options focus on specific regions, individual countries, or market segments like emerging economies. These funds handle currency conversion, foreign custody, and tax reporting internally, so you buy and sell them on a US exchange like any domestic stock. The main thing to watch is overlap: holding both a broad European fund and a single-country fund within that region can double you up on certain companies without your realizing it.
American Depositary Receipts
ADRs let you buy shares of individual foreign companies directly on US exchanges, denominated in dollars. A US bank holds the actual foreign shares and issues the ADR, which then trades like any domestic stock. Major foreign companies including Nestlé, Toyota, and Shell all have ADRs listed on the NYSE or Nasdaq. Sponsored ADRs from large companies that fully comply with SEC reporting are the safest and most liquid; unsponsored or over-the-counter ADRs may have less transparency and thinner trading volume.
Direct Foreign Stock Purchases
Some US brokerages allow you to trade directly on foreign exchanges in local currency. This reaches companies that don’t have ADRs, including smaller and mid-cap foreign firms. The drawbacks are real: transaction costs are higher, you deal with currency conversion on every trade, settlement procedures vary by country, and tax reporting gets more complicated.
The Foreign Tax Credit
Dividend income from foreign companies is frequently subject to withholding taxes imposed by the country where the company is based. You can usually offset those payments by claiming a foreign tax credit on IRS Form 1116. The credit is limited to the ratio of your foreign-source taxable income to your total taxable income, multiplied by your US tax liability. If the foreign tax you paid exceeds that limit, the excess can be carried back one year or forward for up to ten years.1Internal Revenue Service. Foreign Tax Credit – How to Figure the Credit For small amounts of foreign tax, you may be able to claim the credit directly on your return without filing Form 1116, but once foreign investments become a meaningful part of your portfolio, you’ll almost certainly need the form.2Internal Revenue Service. Foreign Tax Credit
Reporting Requirements That Catch People Off Guard
International investing triggers reporting obligations that don’t apply to a domestic-only portfolio. Missing them can produce steep penalties even when you owe no additional tax.
Form 8938 (FATCA)
The Foreign Account Tax Compliance Act requires US taxpayers holding specified foreign financial assets above certain thresholds to report them on IRS Form 8938 with their annual return. For unmarried taxpayers living in the US, the filing threshold is $50,000 in total foreign asset value on the last day of the tax year, or $75,000 at any point during the year. Married couples filing jointly have a $100,000 year-end threshold or $150,000 at any time. Thresholds are significantly higher for taxpayers living abroad.3Internal Revenue Service. Comparison of Form 8938 and FBAR Requirements
Most investors holding foreign stocks through a US-based brokerage or US-listed ETFs won’t trigger Form 8938 requirements, because those assets are held by a US financial institution. The form matters most when you hold accounts directly with foreign banks or brokerages, own foreign real estate through a foreign entity, or have other financial interests held outside the US system.4Internal Revenue Service. Summary of FATCA Reporting for U.S. Taxpayers
FBAR
Separate from Form 8938, you must file an FBAR (FinCEN Form 114) if the combined value of your foreign financial accounts exceeds $10,000 at any point during the calendar year.5Internal Revenue Service. Report of Foreign Bank and Financial Accounts (FBAR) The $10,000 threshold is aggregate: two accounts with a combined balance over $10,000 both require reporting even if neither individually exceeds the threshold.3Internal Revenue Service. Comparison of Form 8938 and FBAR Requirements
The FBAR is filed electronically through FinCEN’s BSA E-Filing System, not with your tax return. It’s due April 15 with an automatic extension to October 15.5Internal Revenue Service. Report of Foreign Bank and Financial Accounts (FBAR)6Office of the Law Revision Counsel. 31 USC 5321 – Civil Penalties7Justia Law. Bittner v. United States Willful violations carry penalties up to the greater of $100,000 or 50% of the account balance, and those penalties apply even if you owe no tax on the accounts.
Form 8938 and the FBAR may apply simultaneously. They have different thresholds, cover slightly different asset types, and go to different agencies. The IRS publishes a side-by-side comparison worth reviewing before your first filing.3Internal Revenue Service. Comparison of Form 8938 and FBAR Requirements
The PFIC Rule That Makes Fund Choice Matter
This is where international tax rules get genuinely punitive, and most investors have never heard of it. A Passive Foreign Investment Company is any foreign corporation where either 75% or more of its gross income is passive (dividends, interest, rents, royalties) or at least 50% of its assets produce or are held to produce passive income.8Office of the Law Revision Counsel. 26 US Code 1297 – Passive Foreign Investment Company In practice, virtually every foreign-domiciled mutual fund and many foreign ETFs qualify.
The tax treatment is deliberately painful. When you sell PFIC shares or receive a distribution above 125% of the average distributions over the prior three years, the gain gets allocated across your entire holding period. Each year’s allocated portion is then taxed at the highest individual tax rate that was in effect for that year, and interest is charged on the resulting tax as if you had underpaid in each of those prior years.9Office of the Law Revision Counsel. 26 USC 1291 – Interest on Tax Deferral Top-rate taxation plus interest charges can eat a staggering percentage of your gains.
The practical takeaway is straightforward: buy international funds that are US-domiciled. A US-based ETF holding foreign stocks is not a PFIC; it’s a regulated investment company subject to normal US tax rules. Only when you buy a fund actually organized in a foreign country do the PFIC rules kick in. This trips up investors who open brokerage accounts abroad or buy foreign-listed index funds thinking they’re equivalent to their US counterparts.
Risks Worth Sizing Against the Benefits
Foreign governments can change tax regimes, impose capital controls, restrict profit repatriation, or in extreme cases nationalize entire industries. Legal recourse in such situations is typically limited to the courts of the host country, where obtaining a fair outcome against the government can be difficult. The risk is highest in emerging markets with weaker institutional protections but is not zero in developed economies. Diversifying across multiple countries rather than concentrating in one reduces the impact of any single government’s actions.
Accounting standards, disclosure requirements, and corporate governance practices vary significantly across countries. Financial statements from some foreign companies may not be directly comparable to what US investors are accustomed to, and earnings quality can be harder to assess. Language barriers compound the problem. This is one of the strongest arguments for using professionally managed funds or sticking with large, well-covered ADRs rather than picking individual foreign stocks yourself.
Many foreign exchanges, particularly in emerging markets, have lower trading volumes than US markets. That means wider bid-ask spreads, higher transaction costs, and potentially difficulty exiting positions quickly during market stress. Even large-cap stocks in some developed markets trade with less liquidity than their US equivalents. Funds mitigate this somewhat by pooling investor capital, but concentrated positions in thinly traded foreign stocks carry real liquidity risk.
Currency effects, finally, can dominate returns over short horizons even when they wash out over decades. An investor who piled into European stocks in 2014 and sold in 2016 would have seen meaningful drag from the dollar’s strength during that period, regardless of how those stocks performed in euro terms. Sizing your international allocation to a horizon you can actually hold through is the practical answer.