Monday, October 26, 2009

Halloween, eh?

After cogitating on that "Irrational Decision" stuff, I wondered if'n investors are frightened by Halloween hobgoblins, witches and ghosts.
Perhaps, fearing untoward events, they dump their stock at the end of October.
Perhaps, compared to other end-of-month returns, the return (the close on Oct 31 vs the previous day's close) is dramatically less.
Perhaps (Mean of Oct 31 returns) - (Mean of ALL end-of-month returns)
... this difference is dramatically negative.
So I check a gaggle of end-of-October stock returns (mostly DOW stocks) over the last 10 years:

Mamma mia!
It's clear!
The hobgoblins are nice guys on Halloween, eh?

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'course, there may be other end-of-month returns that are attacked caressed by hobgoblins.
Working on the assumption
"How goes the DOW,so goes the World"
I play with the DOW:

Now the hobgoblin effect is evident.
They don't like short months:
Here's February:


Did I mention that there's a spreadsheet to play with?
http://www.gummy-stuff.org/Excel/halloween.xls
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P.S. There's this
"Sell in May and Go Away"

called the Halloween Indicator.
Anybuddy believe it? If so, BUY NOW!

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Did I mention my Contest portfolio?
It dropped 5.3% on Oct 30?

 

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