NEW YORK ( TheStreet)- Tiffany ( TIF) is feeling the love right before Valentine's Day, as it was upgraded by Bank of America to buy. Bank of America said shares of Tiffany are down 15% since the jeweler reported strong holiday sales on Jan. 15. "In our view, Tiffany has attractive growth opportunities through international square-footage growth and market-share gains, and has an opportunity to improve margins due to the lagged effect of lower product costs," Bank of America wrote. -- Reported by Jeanine Poggi in New York. Follow TheStreet.com on Twitter and become a fan on Facebook.