how much did gspc gain from 2008 to 2012

Between 2008 and 2012, Gladstone Investment (GAIN) returned 17.9% and the S&P 500 (GSPC) returned -2.8%.

DATE the S&P 500 Gladstone Investment
December 2012
$1,426.19
$2.04
November 2012
$1,416.18
$2.04
October 2012
$1,412.16
$2.14
September 2012
$1,440.67
$2.24
August 2012
$1,406.58
$2.17
July 2012
$1,379.32
$2.04
June 2012
$1,362.16
$2.08
May 2012
$1,310.33
$2.05
April 2012
$1,397.91
$2.06
March 2012
$1,408.47
$2.09
February 2012
$1,365.68
$2.14
January 2012
$1,312.41
$2.21
December 2011
$1,257.60
$1.96
November 2011
$1,246.96
$2.02
October 2011
$1,253.30
$1.99
September 2011
$1,131.42
$1.80
August 2011
$1,218.89
$1.79
July 2011
$1,292.28
$1.83
June 2011
$1,320.64
$1.85
May 2011
$1,345.20
$1.92
April 2011
$1,363.61
$1.98
March 2011
$1,325.83
$1.97
February 2011
$1,327.22
$2.09
January 2011
$1,286.12
$1.78
December 2010
$1,257.64
$1.91