To The Moon

1) US stock market is the largest in the world and USD is the world's reserve currency and most widely used currency is the world.  These two reasons make listing in US one of top choices for a company if they want to list at a good a price because it the biggest stock market with the most volume of transactions and possibly most liquid.  Which is why Alibaba list in the US (besides HK).

2) Delisting from the US stock market means possibility of being taken down in major US indices.  With many passive funds investing and tracking indices, if a company is being removed from its indices, the passive funds would have to sell the share to match the indices.  (Selling = increase in supply of shares = lower share price)

3) Some investment vehicles have a mandate to invest by geographical location or by certain curre cy, US and Hong Kong have differing currency and financial reporting standards, not to mention lelal and tax differences.  If the delisting causes these conpanies to sell Alibaba in the US to abide by their mandates (again selling = increase in supply of shares = lower share price)

For me I am not too concern and take this as an opportunity to load up on the share.  This is because if the company fundamentals are still the same and most importantly continue to be profitable then eventually the share price will increase.

My only bugbear is how far regulations by Chinese authorities will hit Alibaba.