President Donald Trump this week signed an executive order to create a plan for a U.S. sovereign wealth fund. Here’s a look at what they are, and which ones are the world’s largest.

President Donald Trump’s executive order to create a plan for a U.S. sovereign wealth fund would follow those of Norway, Saudi Arabia, China and others.

Key Takeaways President Donald Trump has ordered his top financial advisors to establish a sovereign wealth fund and provide details in 90 days.A U.S. sovereign fund would be unusual: countries usually establish funds to invest in budget surpluses,