How do markets set prices?
BLUF: Market prices arise from supply-and-demand balance.
A fundamental explanation of how do markets set prices?
The Explanation
Market prices arise from supply-and-demand balance. In a competitive market, producers post supply (minimum prices they'll sell at) and consumers have demand (maximum prices they'll buy at). The equilibrium price is where quantity supplied equals quantity demanded. If demand exceeds supply, prices rise (until demand falls or supply grows); if supply exceeds demand, prices fall. In short: buyers and sellers "bargain" through many transactions, and the market-clearing price adjusts so that what people want to buy matches what is available. This decentralized price mechanism allocates resources: higher-priced goods signal producers to make more and buyers to buy less, and vice versa.