END-OF-CHAPTER QUESTIONS AND PROBLEMS
1. (Market Efficiency and Theoretical Fair Value) An efficient market is one in which prices reflect the true economic values of the assets trading therein. In efficient markets, no one can earn returns that are more than commensurate with the level of risk. Efficient markets are characterized by low transaction costs and by the rapid rate at which new information is incorporated into prices.
2. (Arbitrage and the Law of One Price) Arbitrage is a type of investment transaction that seeks to profit when identical goods are priced differently. Buying an item at one price and immediately selling it at another is a type of arbitrage. Because of the combined activities of arbitrageurs, identical goods, primarily financial assets, cannot sell for different prices for long. This is the law of one price. Arbitrage helps make our markets efficient by assuring that prices are in line with what they are supposed to be. In short, we cannot get something for nothing. A situation involving two identical goods or portfolios that are not priced equivalently would be exploited by arbitrageurs until their prices were equal. The "one price" that an asset must be is called the “theoretical fair value.”
3. (Arbitrage and the Law of One Price) The law of one price is violated if the same good is selling at different prices. On the surface it may appear as if that is the case; however, it is important to look beneath the surface to determine if the goods are identical. Part of the cost of the good is convenience and customer service. Some consumers might be willing to pay more because the dealer is located in a more desirable section of town. Also, the higher priced dealer may have a better reputation for service and customer satisfaction. Buyers may be willing to pay more if they feel that the premium they pay helps assure them that they are getting a fair deal. It is important to note that many goods are