Demand

What Is Demand?

In economics and finance, demand describes how much of a product or service consumers want to buy at different prices. It is not simply a wish to own something. Demand only counts when buyers are both willing and able to pay for it. A shopper who would love a new car but cannot afford one adds nothing to demand. Demand is always tied to a price and a time period, such as ten units per week at a given price.

How Demand Works

Demand usually follows the law of demand: as the price of a good rises, the quantity buyers want generally falls, and as the price drops, buyers generally want more. This happens because higher prices make people look for substitutes or buy less, while lower prices make the item more attractive. Economists show this relationship on a demand curve, which typically slopes downward from left to right.

Several factors can shift demand overall, meaning buyers want more or less at every price. These include consumer income, the prices of related goods, tastes and trends, expectations about future prices, and the number of buyers in the market. A change in the price itself moves along the curve, while these other factors move the whole curve.

Why Demand Matters to Investors

Demand helps explain the revenue and growth prospects of companies. When demand for a firm's products rises, sales and often profits can increase. When demand weakens, companies may cut prices, lower output, or see earnings fall. Analysts often study demand trends when evaluating a business, its industry, or the broader economy, since strong or weak demand can influence corporate earnings, stock prices, and the overall path of economic growth.

Demand also interacts with supply to set market prices. When demand exceeds supply, prices tend to rise. When supply exceeds demand, prices tend to fall. Understanding this balance can help investors interpret price movements, though it does not predict them with certainty, since many factors affect both sides of the market at once.