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Can you send me more information on the Pinchot Plan?
Nov. 15, 2009
No, The Graham Investor does not have any more information other than what is posted in the articles entitled "What the Heck Is A Pinchot Plan" and "How To Start Your Own Pinchot Retirement Plan" and the FAQ here.

Do Benjamin Graham's value investing methods still work nowadays?
Nov. 15, 2009
Absolutely. Value investing is one of the few investing techniques that has always worked. Even in a bull market, there are still stocks which are undervalued. The most important aspect of investing is not the method, but the consistency of application and the ability of the investor to control his or her own emotions, something that Ben Graham was very clear on.

Do you recommend investing in particular companies?
Nov. 15, 2009
I don't recommend companies to invest in. I am not an investment advisor and therefore not qualified or licensed to give advice. These articles are intended to provoke thought and discussion and help you with making your own decisions, not make them for you.

First, thanks for creating this site, the Piotroski screen is great. Couple of questions: have you backtested the Piotroski scan? If so, any you can share? Second, what is the stock universe you use for the scan, specifically for the US? Thanks in advance.
Dec. 12, 2013
I have not personally backtested it, but I do have historical scores and will look at those vs price. Universe is pretty wide - US, Canada, Europe, Australia. I'll try and make it more user-friendly / searchable.

Great site!!! I am having trouble with entering Canadian Stock symbols with GI Quotes. Any reason for this?
Dec. 15, 2009 by Curtis Campbell, Saskatchewan
Generally Canadian stocks should work if the balance sheet data is available, but evidently it isn't always in place. We hope to have more complete data for Canadian stocks soon. Possibly also UK, European and Australian stocks, too. So keep checking back!

How did you create the screens?
Nov. 15, 2009
The screens are custom-coded from scratch using a combination of different programming languages.

How often do you update the screens, say, the Piotroski scores? Meanwhile, do you use a specific software to get all the nine parameters from the internet?
Jul. 19, 2010 by Steve K, NY
Hi, Steve:

Piotroski scores are updated daily for screened stocks, monthly for others.
Unfortunately my code is a little broken at the moment (as of July 2010) due to some changes in the underlying
data and I'm working on a longer-term fix, meanwhile the Piotroski scores are not updating. ***FIXED AS OF AUG 2010.

It's my own code, I don't use any third party s/w.

Check back in a week or two to see if it is fixed.

I am new to investing and need to understand how to properly analyze companies to determine where I wish to invest. Could you direct me to an easy to ready and understand book.
Mar. 2, 2010 by David Grunbaum, New Jersey
Hi, David.

Good question. I don't have a good answer. It depends a lot on your investment style and attitude to risk. A good book to start with would be Joel Greenblatt's "You Can Be a Stock Market Genius". The best thing to do would be to go to a library or bookstore and pick a few books and skim through them; it will very quickly become apparent which ones appeal to you. You can then read those in more depth. Meanwhile put lots of money aside for when you are ready to start.

I have found the Piotroski score you generate differs to my own estimates and that of other screeners and want to understand why there is a discrepancy. Could you provide more clarity on how exactly you calculate this. For example do you base it on annual or half yearly or quarterly accounting data and when look at the 'change' variables are you looking back the previous year or sequential period?
Dec. 19, 2011
On my site they are based on quarterly data, comparing with previous quarter. I will soon be offering them based on annual data also, and also giving history of Piotroski score changes.

I understand what the difference is between shares outstanding and float but do not understand the implication. There are more numerous companies that appear in the NACV calculation when using float. Does that make these companies have a more or less attractive valuation and why?
Feb. 7, 2010
Thanks a lot for an insightful question. The float NCAV screen was my own idea; my reasoning is that the non-float portion of the outstanding shares would (usually) be tightly held by insiders. Therefore the remaining (float) shares should have a greater impact on moving the share price. I would say they have a more attractive valuation, all other things being equal, but clearly it is a matter of opinion.

I would like to advertise on this site; how do I go about it?
Feb. 1, 2014
You can certainly advertise directly, usually on a month-to-month basis. Please send an email to contact@grahaminvestor.com for some campaign links with Adsense Direct.

I'd like to do a link share, do you participate in link sharing?
Nov. 15, 2009
The Graham Investor does not participate in link sharing schemes for the sake of pagerank. We only post relevant or interesting links on their own merit. If you think your site may be of interest to TGI and is relevant to the topics covered here, by all means send me a link for review.

It seems wrong to enjoy such incredible information for free. I would like to make a donation. How can I pay you?
Feb. 14, 2013 by Stephen Wladowski
Thank you! If you would like to make a donation to The Graham Investor, you can use Paypal to make a payment to: contact@grahaminvestor.com

If you don't wish to use paypal and would rather mail a check, send me an email at the above address.

More accurate data can be obtained from _location_ , why don't you use that?
Nov. 15, 2009
We are constantly evaluating other sources of data. We will change the data source when a more robust and up-to-date source is found, but the current sources are adequate for our needs.

Regarding the Piotroski screen.... are the companies currently on your list from 2010? Did you fix the glitch? I ask because I want to see how these companies have performed since they passed the screener. Thanks Jarrod
Aug. 28, 2014
Piotroski screen has been fixed (finally).

The screens or quotes are not displaying or don't seem to be up to date. I think something's broken. What do I do?
Nov. 15, 2009
Contact TGI via email at contact@grahaminvestor.com stating what is broken.

This site is a wonderful free resource, but I feel a bit guilty taking advantage of it regularly. May I make a donation? If so, what is the best way to pay you?
Feb. 1, 2014
Thank you for your thoughtfulness! You can send a Paypal payment to contact@grahaminvestor.com ; if you don't have a Paypal account, just email for details on where to send a check or money order donation.

What happened to ASFI? It does not appear on the NCAV screen, even though it meets all criteria.
Jan. 1, 2010
The NCAV screen shows those stocks that meet NCAV up to 130% of last close, AND with positive cash flow. At the time the screen was generated, cash flow data was not available for ASFI. At some point I will be making the cash flow requirement optional (user-selectable)

Where does the data come from, and how accurate is it?
Nov. 15, 2009
The data is gathered from various well-known free sources on the web. As for accuracy, you get what you pay for. Even so, data that you pay for has inaccuracies or dated components. The key is to follow up the screens and/or quotes with your own due diligence. If you notice any out of date or incorrect data, please let us know!


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