I've recently been thinking about my sources of investment ideas and how that's changed over time. Given I'm not a full-time investor time is a big constraint when it comes to finding good ideas given a lot of my time goes in to researching existing positions and checking and re-checking my current thesis. When I first started, I got essentially 100% of my ideas from two sources: The Motley Fool UK message boards and anything that came up on my share screener results. I used to use the Sharelockholmes screener but the new Stockopedia one is just brilliant - they have a selection of pre-prepared screens but you can customise and save your own so I've got plenty looking for things like negative enterprise value, low EV/Sales, low P/B & high 5y ROE etc.

As I've learnt more about investing I've slowly added more strings to my bow and now I get ideas from a much wider range of places: Blogs, twitter, bulletin boards, stockopedia, newsletters, company presentations, email contact and more. It's incredible the amount of ideas I have access to from a wide range of investors and a testament to the power the private investor can have in the internet age.

Right now I find I'm using blogs more and more as a great way to find initial ideas. I've got round to adding a 'Blogroll' to the site which contains all the investing blogs I regularly read - I recommend taking a look through them if you're interesting in finding more ideas from other investors (predominately small cap value investors, but there's a few others in there too) who are frequently far better than myself. Even if I don't find myself agreeing with the author's thesis I always find myself learning something so it's a great way to develop as an investor.

You may have noticed a fair few non-UK blogs in my blogroll (especially a number of US investors) and also noticed a distinct lack of any non-UK listed investments in my last portfolio update. This is not because my international counterparts have failed to convince me of the merits of their markets but, I'm embarrassed to say, largely a failure of my own investment process.

In the UK market I subscribe to two services (Stockopedia and Sharelockholmes) which together allow me to quickly investigate a company's financials within minutes and form…

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