I have a site ranked for many keywords on various posts. From last 3 weeks I observe loosing rankings one by one on all posts. One KW moved from 5th to 20th Other from 1 to 11th , 1 to 6th All these changes are not on the same day. I have made all links with white hat seo & made few links from High PR PBN. All other sites using this PBN are doing well. Only this site is loosing rankings . What can be the reason? I am hosting the site on host stage. I observe lot of down times every day for few minutes& loading speed of my site is 6.3 seconds. This may be the reason?