If I move my website, which is hosted in Europe, to a host based in Asia, could it hurt my ranking in Google search?
I will keep my domain registrar in Europe, so my guess is that the ranking will not be affected.
What do you think?
Matt Cutts covers this in two videos:
Basically, it does affect your rankings, but primarily for personalized search results.
It could affect your ratting indirect. If your site is for the european market, google will try to crawl it with eruopean google crawlers and if the hosting will be in Asia the page load speed will increase. This could affect negative your position in SERP