I doubt if they're worth wasting time on. Quite apart from their own particular issues the finance sector in general is not the area to be in these days (with just the odd exception, e.g. PGC.)
Energy, farm production, healthcare and selective exporters are the areas to concentrate on.
I remember a piece of sage advice I absorbed a few years ago - "concentration on asset class allocation, rather than individual stock selection, will generally provide better portfolio returns in the long run." I believe that still holds true.