Yes it is unleashing a huge stash of the Winklevoss' coins.. but NOT TO MARKET. Only to customers of the ETF. = No effect on the market.
Not until the sell all shares and need more coins to satisfy demand,, will we see an effect.
At least, that is my take on it anyway. I stand to be correct if wrong.
hm... if the winklevoss brothers wanted to sell their stash, they could always do so. why would they go through the most complicated way of an etf that needs approvement, paperwork, etc. if they wanted to sell, they would have done it already otc or via exchanges.
their intention is to keep their stash and when thier etf gets approved and institutional investors want lots of btc etf then this would create a huge demand = c c m f
edit: typo
If memory serves , and I'm an elderly fecker so it doesn't always, the twins had/have 100,000?