The start date for trading in Zoetis shares has not yet been announced but is supposed to be in Jan or Feb 2013. If all goes according to plan, the shares of Zoetis still owned by PFE following the IPO will be distributed to PFE shareholders in Jul 2013.
p.s. Zoetis is pronounced zo-ET-is.
“The efficient-market hypothesis may be the foremost piece of B.S. ever promulgated in any area of human knowledge!”