Continuing from our previous example, suppose we invested $ 50,000 in AMZN, $ 10,000 in GSPC, $ 30,000 in YHOO, and $10,000 in IBM. How much would our portfolio return be as of December 31, 2013 if we made the investment in those securities on December 31, 2010? Continuing from our previous example, suppose we invested $ 50,000 in AMZN, $ 10,000 in GSPC, $ 30,000 in YHOO, and $10,000 in IBM. How much would our portfolio return be as of December 31, 2013 if we made the investment in those securities on December 31, 2010