Clearly, lumping multiple unrelated news articles into the same post is a forced, clumsy solution -- if for no reason other than failing to clue in the reader regarding new content.
Perhaps a more elegant approach would be to alter the posts, somehow? With each one already being new, pertinent, unique, and containing a nontrivial, enlightening payload, what other qualities must each posses to reduce its ...'bumpishness'?
No, it does not create a mess if you properly format it like I tend to do. Use this:
[hr][hr]
to separate with two lines. It really looks nice in my opinion. This is just my suggestion (not a solution); either: A) merge posts; B) Do not post so frequent that you have a lot of posts in a row. There's really no need to post so many "news articles" each day in a single thread.
Or would it be more appropriate to simply start a new topic, as more 'bearish news' come to light?
Actually I think that it might be even worse considering how many news articles you've posted so far.