Tiffany: Alive and Kicking?

Yesterday, Tiffany ( TIF ) was the best-performing stock in the S&P 500 after investors bid it up following Richemont's strong earnings release . And the bullishness keeps coming today, as Wells Fargo upgraded Tiffany to Market Perform from Underperform. While that's not exactly a rousing endorsement, Cowen's Oliver Chen and team have no such reservations on the stock--they rate Tiffany Outperform--and recommend buying its shares into its holiday-sales update on Jan. 17. They explain why: