A. if you found a stock with a zero historical beta and held it as the only stock in your portfolio, you would by definition have a riskless portfolio. b. the beta of a portfolio of stocks is always larger than the betas of any of the individual stocks. c. the beta of a portfolio of stocks is always smaller than the betas of any of the individual stocks. d. it is theoretically possible for a stock to have a beta of 1.0. if a stock did have a beta of 1.0, then, at least in theory, its required rate of return would be equal to the risk-free (default-free) rate of return, rrf.

Because this market is a monopolistically competitive market, you can tell that it is in long-run equilibrium by the fact thatmr=mc at the optimal quantity for each firm. furthermore, a monopolistically competitive firm's average total cost in long-run equilibrium isless than the minimum average total cost. true or false: this indicates that there is a markup on marginal cost in the market for engines. true false monopolistic competition may also be socially inefficient because there are too many or too few firms in the market. the presence of the externality implies that there is too little entry of new firms in the market.