Sovereign wealth fund
A sovereign wealth fund (SWF) is a state-owned investment fund investing in real and financial assets such as stocks, bonds, real estate, precious metals, or in alternative investments such as private equity fund or hedge funds. Sovereign wealth funds invest globally. Most SWFs are funded by revenues from commodity exports or from foreign-exchange reserves held by the central bank. By historic convention, the United States' Social Security Trust Fund, with $2.8 trillion of assets in 2014, is not considered a sovereign wealth fund.
Some sovereign wealth funds may be held by a central bank, which accumulates the funds in the course of its management of a nation's banking system; this type of fund is usually of major economic and fiscal importance. Other sovereign wealth funds are simply the state savings that are invested by various entities for the purposes of investment return, and that may not have a significant role in fiscal management.
The accumulated funds may have their origin in, or may represent, foreign currency deposits, gold, special drawing rights (SDRs) and International Monetary Fund (IMF) reserve positions held by central banks and monetary authorities, along with other national assets such as pension investments, oil funds, or other industrial and financial holdings. These are assets of the sovereign nations that are typically held in domestic and different reserve currencies (such as the dollar, euro, pound, and yen). Such investment management entities may be set up as official investment companies, state pension funds, or sovereign oil funds, among others.