how much did gspc gain from 2008 to 2012

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

DATE the S&P 500 Gladstone Investment
December 2012
$1,426.19
$1.94
November 2012
$1,416.18
$1.95
October 2012
$1,412.16
$2.04
September 2012
$1,440.67
$2.14
August 2012
$1,406.58
$2.07
July 2012
$1,379.32
$1.95
June 2012
$1,362.16
$1.98
May 2012
$1,310.33
$1.96
April 2012
$1,397.91
$1.96
March 2012
$1,408.47
$1.99
February 2012
$1,365.68
$2.04
January 2012
$1,312.41
$2.11
December 2011
$1,257.60
$1.87
November 2011
$1,246.96
$1.92
October 2011
$1,253.30
$1.90
September 2011
$1,131.42
$1.71
August 2011
$1,218.89
$1.71
July 2011
$1,292.28
$1.74
June 2011
$1,320.64
$1.76
May 2011
$1,345.20
$1.83
April 2011
$1,363.61
$1.88
March 2011
$1,325.83
$1.88
February 2011
$1,327.22
$1.99
January 2011
$1,286.12
$1.69
December 2010
$1,257.64
$1.82