Fitbit Inc. shares are up 1.2% in Thursday morning trading and on pace to post a gain for the sixth-consecutive day. Shares are up 20% during the six-day stretch. The stock's last six-day winning streak came in September. Fitbit announced at the beginning of the week that it had sold more than a million Versa smartwatches since mid-April. The company's announcement yesterday that CFO Bill Zerella would be stepping down didn't hurt the stock's rally. "We do not expect Fitbit CFO Bill Zerella's departure to create waves," Wedbush analyst Alicia Reese wrote Wednesday. "We think it was a good choice on the part of management to clearly state in its press release that Zerella is leaving to join an autonomous vehicle startup, indicating that there were no internal issues driving his departure." Reese rates the stock at neutral with a $6 target price. Morgan Stanley analyst Yuuji Anderson reiterated his underperform rating and $4 target Thursday, writing that while his latest channel checks showed momentum for the Versa, they also indicated "accelerated declines in older products." Shares are up 23% over the past 12 months, while the S&P 500 has gained 14%.