from http://money.cnn.com/data/premarket/index.html
U.S. Stock Futures
Data as of 12:47am ET
S&P -4.70 / -0.37%
Level 1,277.30
Fair Value 1,282.96
Difference -5.66
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Why the fair value is 1282.96, instead of 1289.00?
1289.00 is the close value of 6/9/2011.
