However, some trading centres still exist today, particularly for certain types of financial instruments such as commodities and derivatives. For example, the Chicago Mercantile Exchange (CME) and the New York Mercantile Exchange (NYMEX) are two of the world's largest trading centres for commodities such as agricultural products, metals, and energy.
In a trading centre, traders and brokers would typically occupy designated areas or trading pits where they would negotiate and execute trades. Prices for the various financial instruments would be displayed on large boards or screens, and traders would use hand signals or other methods to communicate with each other.
While trading centres have largely been replaced by electronic trading, they still hold a certain significance in the financial world. They provide a physical location for traders to meet and interact with each other, and they also serve as a reminder of the history and tradition of financial markets.