AP Images/Paul Sakuma TIF Tiffany & Co 118.27 16.02 (+15.70 %) Disclaimer Get real-time TIF charts here " Tiffany & Co soared more than 14% in pre-market trading Wednesday after reporting first-quarter results that beat expectations. Same-store sales of 7% easily topped analysts' 2.6% estimate. The jewelry company boosted its fiscal year guidance and announced the approval of a $1 billion buyback program.