Oct

12

 I tested the old Jewish trader axiom "Sell on Rosh Hashanah and buy back on Yom Kippur?".

Andy Aiken writes:

Historically, returns between the two holidays are negative, but not often enough so to be a reliable calendar trade. Average returns are distorted by 2008.

Year    SPX change (%)
2000    -2.40%
2001    -1.94%
2002    -0.32%
2003    3.76%
2004    -0.92%
2005    -4.06%
2006    1.26%
2007    3.68%
2008    -17.76%
2009    -0.50%
2010    2.43%
2011    0.38%
2012    -2.21%
2013    1.77%
2014    -2.03%
2015    0.31%

% negative      56.3%
average return  -1.16%
median return   -0.41%

A 2004 paper suggests that the negative returns during this period may be due to lower-than-usual volume.


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