Consider the stocks, AAPL and MSFT. Using Yahoo Finance (or similar), calculate the standard deviations for each stock, along with the correlation between the two.
1. What would be the volatility of a portfolio with 50% in AAPL and 50% in MSFT?
2. How about 25% in AAPL and 75% in MSFT?
3. How about 73% AAPL and 25% MSFT?