IPO questions affect Facebook value As share prices continue to fall, US regulators called for a review of last week's Facebook Initial Public Offering (IPO). May 23 2012 at 02:13pm Related Stories Comment Guidelines Please read our comment guidelines. Login and register, if you haven’ t already. Write your comment in the block below and click (Post As) Has a comment offended you? Hover your mouse over the comment and wait until a small triangle appears on the right-hand side. Click triangle () and select "Flag as inappropriate". Our moderators will take action if need be.