In the perspective of accounting, are Securities Markets fully efficient? Discuss. 2. What are some of the key factors and mechanisms that can create limits to arbitrage in financial markets, and how do these limits affect the efficiency of markets and the ability of arbitrageurs to exploit mispricing? Provide specific examples to illustrate your points. 3. Explain Ohlson's Clean Surplus Theory and how it relates to the determination of a firm's intrinsic value. Discuss the key assumptions and implications of this theory, and provide examples to illustrate its application in financial analysis?