Efficiently inefficient markets indicate what about market prices?

• A. They are perfectly efficient and do not allow for arbitrage
• B. They are informationally efficient enough to prevent risk-taking
• C. They are inefficient to compensate for the costs of skill-based strategies
• D. They suffer from high volatility and unpredictability

Answer: (C)

Efficiently inefficient markets suggest that while market prices may not be perfectly efficient, they are sufficiently efficient in what they do offer to prevent arbitrage opportunities from being exploited consistently. This means that any inefficiencies present in the market exist as a means to compensate for the costs associated with skill-based strategies.

In these markets, skilled investors may be able to exploit these inefficiencies, but the costs of pursuing such strategies, including transaction costs and time, can often render the expected returns not significantly higher than what one would achieve through passive investment strategies. Therefore, the concept emphasizes that while there are opportunities for generating returns through expertise or insight, the inherent transaction and operational costs may negate the effectiveness of these strategies. Thus, the market's inefficiency serves a purpose in rewarding those who can navigate it with skill against the costs of doing so.

This encapsulates the rationale for why option C is the correct choice.