http://www.valueinvestingnews.com/petrochina-look-back Comments for "PetroChina: A Look Back" en http://www.valueinvestingnews.com/petrochina-look-back I take a look at Buffett's investment in <strong>PetroChina (PTR)</strong> now that Berkshire has sold the entire stake. http://www.valueinvestingnews.com/petrochina-look-back#comments Stock Analysis PTR Wed, 24 Oct 2007 16:37:13 -0400 Max 1993 at http://www.valueinvestingnews.com