Facebook's (FB -9.1%) plunge managed to trigger short-sale curbs at 12:37PM ET, and from the...

|About: Facebook (FB)|By:, SA News Editor

Facebook's (FB -9.1%) plunge managed to trigger short-sale curbs at 12:37PM ET, and from the looks of things, that helped shares stabilize - 18.1% of Facebook's float was shorted as of Aug. 31, quite impressive for a company of its size. In addition to Barron's and Goldman, Stifel contributed to today's misery: analyst Jordan Rohan forecast a "soft transitional period" for Facebook as PC usage flatlines or shrinks in developed markets while mobile usage grows (ed: hasn't it already started?).