A "long" is a term used in finance and investing that refers to the purchase of an asset with the expectation that its price will rise. When an investor goes long on a stock, for example, they buy shares hoping to sell them later at a higher price. This strategy is based on the belief that the asset will appreciate over time. In contrast to going long, investors can also "short" an asset, betting that its price will fall. Long positions are common in various markets, including stocks, commodities, and currencies, and are a fundamental part of investment strategies for individuals and institutions alike.