Context - I've been asked by a friend if it is worthwhile investing in expired domain names in order to obtain their page rank and traffic.
I've read that when a domain that expires and is re-registered, Google wipes the page rank, etc. I've read in other places that this is not the case. Which is true?
I presume that even if this does happen it is of limited relevance, because once a new website is created the new site will be credited with any incoming links whether the pre-date the new registration or not. Even so, the links may be of lesser value if the content/them of the website are substatially different. Is that reasoning sound?