Can switching to HTTPS harm ranking?

If a website goes SSL entirely, can it harm ranking even if done right (no speed loss, http does 301 to https)? Existing incoming links would still be http and it’s assumed that forwarding-links are valued less by Google than links to the page itself Roelant, The Netherlands Have a question? Ask it in our Webmaster Help Forum: www.google.com Want your question to be answered on a video like this? Follow us on Twitter and look for an announcement when we take new questions: twitter.com More videos: www.youtube.com Webmaster Central Blog: googlewebmastercentral.blogspot.com Webmaster Central: www.google.com