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[amibroker] Re: Columbine decile rank idea: Can this be done in AB?



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Gary,

My own personal testing seems to show that the best picks are as you 
say what show up as top ranked at the beginning of any general market 
buy.  It is simple enough and fairly effective when using something  
like NCAlpha to rank coupled with a RUTTR buy signal to DISALLOW 
swaps following initial buys.  If you are trading stocks you'll also 
save of slippage.

Fred

--- In amibroker@xxxxxxxxxxxxxxx, "Gary A. Serkhoshian" 
<serkhoshian777@xxxx> wrote:
> 
> Chuck hit the nail on the head with his recommendation to read the 
Columbine Capital's material !!
> 
> I'll have to re-read the docs they have avail on the site a few 
more times to allow it to sink in, but Columbine Alpha.pdf really got 
me thinking.  Specifically, here's the quote that was the catalyst 
behind this e-mail :
> 
> "At the beginning of every month we measure each stock's 
attractiveness with the
> 
> Columbine Alpha and rank-order all the issues into deciles (equal 
10% groupings).
> 
> Stocks in the top 10% (ranked 1) are most likely to outperform the 
market, and
> 
> those in the bottom 10% (ranked 10) are most likely to 
underperform."
> 
> With Frank's PT, we can score and rank, but sometimes I find that 
with daily rankings (I'm currently playing around with Werner Gansz' 
ncAlpha)  the pickings get to be of a relative lower quality.  
However, it is difficult to easily quantify what this quality 
threshold is as the market cycles through various periods.
> 
> This idea is, instead of trading out of my existing stock if it 
falls out of the top 10 scored to a "better" top 10 stock, I can 
trade out it if falls out of the monthly (or whatever historical 
period) top 10% and move the money either to a top 10% stock or if 
there aren't any go to cash.  Sometimes the top 10 at any one time 
can be below the historical top 10% threshold, and this is the issue 
I'm trying to address (a bit too wordy I'm afraid).
> 
> So, my question is - is it possible in AB to calc percentile 
rankings on some historical period, save those values on a go-forward 
basis and use them as a threshold to determine when to "trade-up" to 
something better or go to cash if no alternatives exist.
> 
> Hope this is clear.  I am realtively new to all this.  So, please 
be patient if I'm asking some questions that have painfully obvious 
answers.
> 
> Regards,
> 
> Gary
> 
>  
> 
> 
> 
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