- It's hard to beat the Market so trade the Market (SPY)
- SPY is very liquid. It's easy to get in and out of trades
- The bid and ask spread it very narrow
- Because of these SPY is a perfect candidate for option trading
- There are plenty of new articles about SPY every day and they are more reliable then articles about individual stocks
- The Technical Analysis of SPY is more advanced than it is for individual stocks
- Trading SPY means there is less risk involved
These are just a few things from the top of my head.