To be honest I didn't hear about this case but I am not surprised. Banks and bankers have often been involved in many scandals like other users before me pointed out, and wherever there is a lot of money there is always a possibility of fraud. Another reason why the blockchain is such a revolution. Imagine if in 10-20 years banks were using a blockchain. A public, verifiable ledger and we could all see the movement of their money. I would be interested to see who has the guts to send/invest it somewhere where it is not supposed to go?!
I think it is not even a shocking news that a bank made something that would yield them a profit. Banks do not care about the legal works, they try to find as many loopholes as possible. I mean think about it this way, if there is a coin that has a volume of 4 thousand dollars, how easy would it be to change the price? You can spend over 10 thousand dollars and decide the direction it will go.
However if a coin has 10 billion dollars in volume, it would require a lot of money to even shake it. Which means banks who have billions of dollars in their funds need to find ways to make profit and that ways are not always legal, their shareholders are expecting profits all the time, every single quarter they have to be better than the previous one. That makes them search illegal stuff like money laundering. The system is really crooked.