US Large Cap Stocks: Large US companies generate a significant portion (41% of revenues for the S & P 500 in 2005) of their revenue abroad. When the dollar is weak, international sales denominated in foreign currency translate into more revenue in dollars.
Foreign Stocks: US investors with a reasonable allocation to international stocks should get help as well. When the dollar declines in value, the value of international stocks goes up in dollar terms.
Foreign Bonds: Having a small portion of your allocation invested in bonds denominated in foreign currencies could provide a boost as well.
The key to compensating for the weak dollar is to maintain a globally well-diversified allocation. We recommend using no-load, low expense ratio index funds, or ETFs for those seeking broad international exposure.