An anonymous reader shares a Quartz report: Unicorns, once a rare sighting for investors, have frolicked across Silicon Valley of late. Now the market seems to be yanking on the reins. Venture capital research firm CB Insights reports the number of venture-backed startups achieving a $1 billion or more valuation ground to a halt over the last six months. In the first quarter of 2016, only five new unicorns arrived. That's compared to an average of about 20 per quarter last year. The number of startups worth at least $1 billion has doubled since 2015 to more than 160, says CB Insights. At the same time, the number of such companies accepting "down rounds" or exits with lower valuations is now up. That number exceeded the quantity of new unicorns being created starting in the last quarter of 2015.

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