For anyone that has experience trading any type of stock, commodity, or even baseball card, you can tell within two seconds that Ethereum is not an aggregate market. It's just one single guy on Poloniex that says "Today the price goes up, tomorrow the price goes down", with no fundamentals or reasoning behind any of it. In Bitcoin there are whales, but often times the whales are fighting against one another. An example would be the attempted BTC shakeout a week ago on BitFinex where someone used around $3 million to try and break the price below $450, but Bitstamp, Coinbase, and others refused to follow their manipulation.
With the DAO scheme (also affiliated with Eth), which is widely being criticized as a blatant scam by many, the SEC and other agencies are going to be looking into what's going on. If it's an R3 banker, the investigation will probably be stonewalled because it would likely just wind up being a banker attack on Bitcoin itself, trying to draw attention away from Bitcoin and get interest in the banker-backed scheme. If it's a Chinaman, they usually don't go after those. However, while all three options are definitely viable, the Occam's Razor solution might wind up being #3, the Ethereum team pump and dumping their own coin with the IPO money you gave them.
Since they received cash + free Eth coins, they don't even need to buy any, just pump and dump straight out of the gate. With Vitalik publicly beginning to dump now, this might be the case. If option #3 turns out to be true, someone is going to be in deep shit, and likely any exchange giving them backroom deals on fees in order to wash trade.
