In practice which market index is most widely used as a proxy for the market portfolio in the CAPM? Naim 13:58 Corporations In practice which market index is most widely used as a proxy for the market portfolio in the CAPM? A) Dow Jones Industrial Average B) Wilshire 5000 C) S&P 500 D) U.S. Treasury Bill Answer: C Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+