README file for two data files:

1. data_250_1000.m
2. data_490_1000.mat

You must use the second file for your homework.

format:
1.  CSV format. After loading it into matlab via command "load", you have two matrices in memory: A,B. 
A = contains daily stock prices for a randomly selected subset of the S&P500 of size 250 for 1000 consecutive trading days (approx 5 years). 
B = contains the ticker names for these stocks. 

2.  Same idea as in 1. but format is binary MAT (matlab format), and contains 490 stocks rather than 250 over the same time period. That's essentially the entire S&P500 index, except for stocks that were removed from the index during the time period.