how much did sandp500 gain from 2008 to 2012

Between 2008 and 2012, Gladstone Investment (GAIN) returned 18.5% and the S&P 500 (GSPC) returned -2.8%.

DATEthe S&P 500Gladstone Investment
December 2012
$1,426.19
$1.89
November 2012
$1,416.18
$1.89
October 2012
$1,412.16
$1.98
September 2012
$1,440.67
$2.08
August 2012
$1,406.58
$2.01
July 2012
$1,379.32
$1.89
June 2012
$1,362.16
$1.93
May 2012
$1,310.33
$1.90
April 2012
$1,397.91
$1.91
March 2012
$1,408.47
$1.93
February 2012
$1,365.68
$1.99
January 2012
$1,312.41
$2.05
December 2011
$1,257.60
$1.82
November 2011
$1,246.96
$1.87
October 2011
$1,253.30
$1.84
September 2011
$1,131.42
$1.66
August 2011
$1,218.89
$1.66
July 2011
$1,292.28
$1.69
June 2011
$1,320.64
$1.71
May 2011
$1,345.20
$1.78
April 2011
$1,363.61
$1.83
March 2011
$1,325.83
$1.82
February 2011
$1,327.22
$1.93
January 2011
$1,286.12
$1.65
December 2010
$1,257.64
$1.77