http://www.cryptocoinsnews.com/alibabas-us-ipo-may-have-crashed-the-bitcoin-price/

It makes sense to me. The chinese have cashed out some of their BTC to buy on the Alibaba IPO. Once they make profits, they'll cash out the BABA gains and get back on BTC which is an actual long term disruptive historical technology tier investment, not some company. I can see how the price will skyrocket in the next months when the chinese get back in (or other inteligent people with money)