Pinterest IPOI like Pinterest as a product, but I don't participate in this IPO.
The main reason is the market doesn't like social networks IPOs:
Twitter, Snapchat.
My expectation is +30-40% in first trade day, maybe this will even hold strong at first quater, but then the financial result with estimates of -1.6 EPS will do the thing, -1.135 billion spending will make it move downwards.
I don't like their lack of users in US... users growth Worldwide is very good, but if they are bots from India and Pakistan, Russia and other countries which pay 0.01 per year and only watch ads.. thats not good for business, only for manipulating User amount data.