All investing is subject to risk, including the possible loss of the money you invest. Diversification does not ensure a profit or protect against a loss.
Investments in stocks and bonds issued by non-U.S. companies are subject to risks including country/regional risk, which is the chance that political upheaval, financial troubles, or natural disasters will adversely affect the value of securities issued by companies in foreign countries or regions; and currency risk, which is the chance that the value of a foreign investment, measured in U.S. dollars, will decrease because of unfavorable changes in currency exchange rates.
Funds that concentrate on a relatively narrow market sector face the risk of higher share-price volatility.