Fitbit continues to grow market share, strengthen its first-mover advantages and grow its defensible moat that is getting stronger every day around its superior ecosystem in wearables. With almost twice the market share of Apple, Fitbit is the undisputed worldwide leader in wearables. Investors should take notice that Fitbit took back market share from both Apple and Xiaomi (PRIVATE: XI ) during the important 4Q15 holiday quarter as shown in the graphic below: Importantly, the above graphic showing Fitbit taking market share from Apple was prior to the successful launch of Fitbit's Blaze, a smart fitness watch. Now the acquisition of increasing amounts of market share by Fitbit from