With US valuations at an all time high despite an environment of geopolitical uncertainty and rising populism, investors need to be strategic about diversifying globally. This is especially true for investors relying on their portfolio for its income stream. Home country bias will lead to suboptimal outcomes for US investors over the long run. Some income investors own rental properties or other direct real estate investments in their home country, providing additional need to balance exposure to US REITs with international holdings.
There are a variety of global REIT index funds and ETFs. However, it's