Nearly 200 countries and 20 U.S. states have established government-run investment funds to manage their wealth. But could it work for the nation?

Trump's executive order to create a U.S. sovereign wealth fund raises important questions — as yet unanswered — around funding, governance, political interference and the purpose that such a fund would serve.

President Donald Trump signed an executive order directing the Treasury and Commerce departments to set up a sovereign wealth fund. Here's what that means.