The NASDAQ symbol for gold is GC. Gold was the monetary standard in the United States until 1971 when President Nixon closed the "gold window" and ended the practice. California and Oregon continue to operate on a gold standard.
The states that have historically produced the most gold in the United States are Nevada, Alaska, California, Colorado and South Dakota. In 2011, the United States produced 232.80 tons of gold, with 74 percent of the total production coming from Nevada. The same year, the United States was responsible for 8.26 percent of the world production of the mineral. Gold is physically stored at the bullion depository at Fort Knox and in the Federal Reserve.