5. Download daily data for the S&P 500 for the period July 1, 2009 through July 1, 2010.

(This historical data is available at http://finance.yahoo.com.)

a. Plot this data in a chart. Are any cycles apparent in your chart?

b. Detrend the data by creating an oscillator that is constructed using a ratio of the current close to the 11-day SMA.

c. Does the plot of this oscillator reveal any cycle in your data?