Zuckerberg aimed to show shareholders, analysts, employees and members that Facebook has not lost its swagger.
Speaking at the TechCrunch conference in San Francisco, 28-year-old Zuckerberg, who has been harshly criticized for his lack of prowess as a CEO, appeared relaxed in his usual casual attire.
While Zuckerberg's speech sparked some excitement and lit a fuel under Facebook's floundering stock, sending shares up 3% in extended trading Tuesday and another 6% by 1 p.m. Wednesday, the rally will be short-lived.
"I certainly wouldn't buy this stock tomorrow," Simon Baker, founder of Baker Asset Management, told CNBC. "It's still an expensive stock-it trades at 30 times next year earnings. In fact, I'd sell the pop."
When Facebook debuted on the Nasdaq May 18, it became the first U.S. company to go public with a value of more than $100 billion. Since the epic IPO, it has lost more than half of its capitalization as investors agonize about waning growth, employee defection, lack of presence in the mobile arena, fading traffic and Zuckerberg's capability at the helm.
That's why CNBC's "Fast Money" regular and president of Metropolitan Capital Karen Finerman shared Baker's skepticism over Facebook stock.
Regarding Zuckerberg's comments about the Facebook mobile strategy, Finerman said, "Unless you think Zuckerberg can monetize mobile and no one else can-I would prefer to be in a stock that trades at a lower valuation."