Lost rankings on several domains -> switch to dedicated IP?

[CFA1973]

Hi, maybe you can help me.
I've lost rankings on several of my domains which are in the same bluehost account on 18/19 March. For many keywords, the domains are at the end to the search results page of Google.
These domains cover various topics and are not all interlinked.

But because the drop in the SERPs happened at almost the same time, I thought that the reason could be the shared hosting where maybe a domain from a "bad neighbourhood" is on the same IP-address.

What do you think? Could switching to a dedicated IP maybe solve the problem of the lost rankings? It's box354 from Bluehost I'm talking about.


Thank you for sharing your thoughts!

[felgall]

Google just did a major update to the way their rankings are determined. That is the most likely cause of the change you saw.

[CFA1973]

Thank you Felgall.
That was also my first thought, but the Panda update only affected google.com. My sites affected all get 80+ of the traffic from google.de and other European countries. The content is absolutely unique (self-written), and other (similar) sites on other BH accounts were not affected. This is why I thought box353 could be the cause for the sudden drop in rankings - but of course I might be completely wrong.