After-hours buzz: FIT, SAVE, SONC & more By: CNBC.com News January 05, 2016 at 18:03 PM EST Check out the companies making headlines after the bell Tuesday: Fitbit, Spirit Airlines, Sonic & more. Read More >> Related Stocks: Bank of America Citigroup Fitbit Inc JPMorgan Chase & Co Pioneer Natural Resources Siriusxm Holdings Inc Sonic Cp Southwest Airlines