Tiffany (TIF - Get Report) shares were higher Friday on the back of an upgrade from analysts at Cowen. They upgraded the stock to OUTPERFORM from NEUTRAL and also raised its price target to $90 from $74. The firm is convinced that the jeweler will continue to improve second half comparable store sales and return to growth in 2017 as unit traffic improves. Tiffany shares have been on a roller coaster ride this year, dipping below $60 at one point this summer. However, year to date the stock is up nearly 4%.