
Provided data includes S&P 500 daily data since 2001 till 23 Nov 2011 (and you can use data post 23 Nov 2011 till 31 Dec 2011 as it is available publicly).
The contest has a prize money pool of $3000 including a prize for community participation.
To learn more and participate, visit www.crowdanalytix.com/contests/sp-500