Trading refers to the act of buying and selling securities, such as stocks, bonds, currencies, commodities, and other financial instruments, with the goal of making a profit. Trading can be done on various financial markets, including stock exchanges, futures exchanges, and over-the-counter (OTC) markets. Trading can be done by individuals or through intermediaries, such as broker-dealers. Trading can be done through various methods, including buying and holding, day trading, swing trading, and algorithmic trading. The approach to trading depends on the individual trader's investment goals, risk tolerance, and market knowledge.