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CFA® Level I question of the day

9 October 2026 · Economics

The structure in which each firm must anticipate its rivals' reactions is:

Show the answer and explanation

Answer: A. oligopoly

With only a few sellers, one firm's pricing decision visibly changes the others' best response.

Why the other options are wrong:

  • B. perfect competition — Each firm is too small to affect the price, so there is nothing for a rival to react to.
  • C. monopolistic competition — Many small differentiated sellers, each of whom can largely ignore the response of any one rival.

Medium · EC.4.a · learning outcome: Contrast monopoly, perfect competition and the market structures in between

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