One of the primary purposes of a profit is to provide funds during downturns in the business cycle. Often referred to as the economic cycle, there are two types of cycles. The first is industry related. The second is broader in scope and is economy wide.
Most economic cycles are recorded in calendar years. Industry cycles are different. Their time frame depends on the product produced and how long from the time the natural resource is purchased to the day the product is sold to the distributors.