Linkedin shares fall almost 40 per cent in biggest ever slide

Revenue expected to be about $820 million in first quarter

Jeff Weiner has overseen the biggest decline in the company's share price since the companys initial public offering in May 2011 Pic: Getty

LinkedIn shares posted their biggest ever decline after the professional networking site forecast a year of slower revenue growth amid signs of weakness in sales of advertising and marketing tools.

Revenue will be about $820 million in the first quarter, and $3.6 billion to $3.65 billion for 2016, the company said. That missed analysts’ average estimate for $867.1 million and $3.9 billion, according to data compiled by Bloomberg. LinkedIn had 414 million users ...