Which of the following statements below is correct? There might be more than one correct answer.

a. Based on the CAPM model there are no taxes or transaction costs in the market and information is costless and available to all investors

b. Based on the CAPM model investors are price takers and investments are limited to financial instruments

c. Based on the CAPM model the risk premium on the market as a whole depends on the average risk aversion of all market participants

d. Based on the CAPM model the market portfolio contains all securities within the market and the weight of each security is its market value as a percentage of the total market