Which of the following statements is NOT CORRECT? O The Y-axis intercept of the security market line represents the required rate of return of a portfolio with a beta of zero which is the risk- free rate. O Inflation, recession, and high interest rates are economic events that are best characterized as being among the factors that are responsible for market or beta risk. The beta of a diversified portfolio of stocks is almost always less stable over time than the beta of a single security. O The higher the correlation between the stocks in a portfolio, the higher the risk inherent in the portfolio