Suppose you had $1000 to invest on September 30, 2016 and you had the option of choosing either AAPL or RRD or a combination of the two (example: 5% in AAPL and 95% in RRD; or 80% in AAPL and 20% in RRD; i.e. in general x% in AAPL and y% in RRD where x%+y%=100%). How would you invest the $1000? Why?