Silver perpetual futures on Polymarket track the spot USD price of one troy ounce of silver, with no expiry and no physical delivery. Silver is a precious and industrial metal used in solar panels, electronics, jewelry, silverware and investment bars and coins, with major mine production in Mexico, Peru and China. The main global reference price is the LBMA Silver Price, set at noon London time each business day in US dollars per troy ounce. Because much of its demand is industrial, silver's price is typically driven by manufacturing and solar demand as well as the US dollar, interest rates and investment flows.