A. An index such as the Valueline Composite Average is constructed by purchasing an equal number of shares of each stock in the index, and will have a downward bias when geometric averaging is used to compute the return.
B. One problem with an index such as the S&P 500 is that firms with greater market capitalization have more impact than other firms.
C. A market value-weighted index, such as the New York Stock Exchange Index, accurately reflects the impact of price changes on wealth.