Problem: A 2-stock portfolio that contains $40,000 of GE stock with a beta of 1.25 and $60,000 of Duke Energy stock with a beta of 0.60 would have a beta of 0.86. What would be the portfolio's beta, if the owner rebalanced the portfolio so that it contained $80,000 of GE and $20,000 of Duke Energy stock? Explain your answers and provides examples.