Merchandise on hand, also known as STOCK, is a term used to describe the amount of goods or products that a business has in its possession. It is an important metric for businesses to track, as it can help them determine how much inventory they need to order and when they need to order it. STOCK is typically measured in units, such as pieces, boxes, or pallets. By tracking their merchandise on hand, businesses can ensure that they have enough products to meet customer demand.