The London Metal Exchange (LME) is the world’s leading metal exchange and a center for trading industrial metals. LME provides a transparent and efficient market for metals trading, and its prices are used as a global reference. They offer futures and options contracts for a variety of metals including aluminum, copper, nickel, tin, zinc, and lead. For more detailed and updated information, you may want to visit their official website or check other authoritative sources related to metals trading and exchanges.