Facebook's stock rebound came to an abrupt end on Monday.
Shares of Facebook declined by nearly 9% in trading on Monday, ending the day at $20.83, on fears that the company's stock is still significantly overvalued.
The stock's decline came after the financial news publication Barron's slammed Facebook in an article over the weekend, arguing that the company's stock is still too pricey and should be valued at $15.
"Facebook is valued at $61 billion, or $53 billion excluding its estimated $8 billion in cash. That's more than 10 times estimated 2012 revenue of $5 billion. Google trades for half that valuation," Andrew Barry wrote in the Barron's article. "What are the shares worth? Perhaps only $15."
Facebook's stock had enjoyed a decent comeback in recent weeks, climbing back above $23 a share for the first time in seven weeks after having hit an all-time low of $17.55 a share in the beginning of this month. The stock's rise started with the news that CEO Mark Zuckerberg would not sell off any shares in the company for at least a year and further helped by his first post-IPO interview with TechCrunch, during which he assured investors that he believes mobile is a top priority.
At its lowest point Monday, Facebook's stock approached the $20 mark again, hitting $20.36 a share. The stock is currently trading at just more than half of the company's IPO price of $38 a share.