What determines the market price of a good in a competitive market?

• A. The government sets the price directly.
• B. Individual firms collude to pick a price.
• C. Prices are determined by random fluctuations.
• D. The intersection of supply and demand; price adjusts to balance quantity supplied and demanded.

Answer: (D)

Prices in a competitive market emerge from the interaction of buyers and sellers. The combined behavior of how much people are willing to buy at various prices (demand) and how much producers are willing to supply (supply) creates the supply and demand curves. The market price settles where these curves meet—the equilibrium price—so the quantity supplied equals the quantity demanded. If demand rises, the price tends to rise to restore balance; if supply rises, the price tends to fall. This dynamic, rather than government meddling or random changes, determines the market price in a competitive setting.