That means shares in the social networking giant have finally returned to the level at which they were first sold in the company's much ballyhooed initial public offering last year. After the IPO fizzled, the stock fell as low as $17.55 in the months that followed.
remained five cents above that IPO milestone when formal trading closed on Friday.
45 percent in the last two weeks, as Facebook reported that its advertising business and particularly its mobile ad sales Monogram Lv Neverfull had grown rapidly in recent months. Shares briefly rose above $38 on Wednesday but sank below that level before trading closed.