In recent weeks, I have been covering growing evidence of pressures in the ICT sector bubble (the Silicon valley blues of shrinking VC valuations and funding). You can track this coverage from here: http://trueeconomics.blogspot.com/2016/04/21416-taking-sugar-from-kids-pantry.html.
Now, with its usual tardiness, the Fortune arrives to the topic too, in a rather good exposition here: http://fortune.com/silicon-valley-tech-ipo-market/.
Good summary graphic from Renaissance Capital:
But, of course, what is more interesting in the sector development is the horror show of earnings reporting that is unfolding across mature segment of the tech sector. These are well-covered here: http://wolfstreet.com/2016/04/24/apple-iphone-revenue-decline-sinks-tech-sector-earnings/, offering the following summary:
So let's see: earnings in mature segment are falling or the 5th quarter in a row (even when you control for Apple performance); earnings of Apple (tech leader) are into their second consecutive quarter of severe pressures. And unicorns (which don't even offer any serious basis for fundamentals-based valuations, including those on the basis of earnings) are rapidly taking on water. You don't really need a CFA to get this one right...