Monthly Archives: September 2014

$BBY.L – Balfour Beatty – trading update disappoints

Shares in heavy construction firm BBY (Balfour Beatty) fell 15.3% to 190.50p today after releasing a disappointing trading update. The Independent reports ( “it warned of a new £75 million black hole in its UK profits and called on accountant … Continue reading

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The stock market has been very interesting this year, and even large-cap shares have been vulnerable. There’s no such thing as a safe share. TATE (Tate and Lyle) issued a profit warning, with supply chain issues, weather affecting corn plant … Continue reading

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Lame joke: A physicist, mathematician and engineer …

It might be unknown by many of you that I have a PhD in mathematics and work in the Oil & Gas industry. After all these years the latter field, I am actually trying to gain some knowledge of Oil … Continue reading

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Simplification of defuzzification in Fuzzy Logic

I have just noticed that my article on Datalog has had far more hits than my articles normally do. The unit conversion program arose because I was interested in another problem: preparing sets of accounts and investment track records. I … Continue reading

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Logic programming example: unit conversion using Datalog

Logic programming can reduce your code size, and make deductions based on facts. I’ll illustrate this using pyDatalog, a Datalog implementation in Python 3, to create a unit conversion program. I provide it wil some basic facts about how many … Continue reading

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#encfs – easy userspace file encryption on Linux

BLUF: encfs provides unfussy user-level mount/unmount of an encrypted directory that can be migrated across machines. Ah, encfs, where have you been all my life? I have been storing passwords in Keepassx. It is an excellent cross-platform password manager, but … Continue reading

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PDF on 2-stage growth DCF calculation explanation

If you have been following my posts on 2-stage DCFs, you may be interested in a PDF that I have written that explains where all the formulae come from. I intend to write more in the article, but it stands … Continue reading

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Magic Hat portfolio: CNCT in, BSY out

The Magic Hat portfolio on Stockopedia ( is an experiment by me to see if a human can improve on a mechanical Greeblatt Magic Formula screen. I am trying to weed out “mistakes” that I feel the screening commits: unseasoned … Continue reading

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$SAL.L – SpaceandPeople – a valuation

BLUF: Estimated value: £30m. Market cap: £9.9m based on a share price of 51p. The share price of SAL (SpaceandPeople) continues to drift lower, and has flatlined, with a downward drift, since its profit warning in April 2014. I have … Continue reading

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DCF repo now reproduces Tesla and Twitter valuations

There has been some interest (OK, one person) in my attempts to reproduce valuation models by Aswath Damodaran, principally in Python 3. I have taken stabs at performing the valuations in Python, Go, Maxima, Octave, and even VB4. I have, … Continue reading

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