Nearly half of J.P. Morgan's Markets platform are millennials so probably not surprising one client put through a $100 million trade on the mobile version of it. The currency move by an undisclosed bank client in late 2016 was a simple transaction changing euros to dollars.
It’s becoming more common for the bank to let clients execute millions of dollars in foreign exchange trades using their cell phones, said Troy Rohrbaugh, J.P. Morgan’s J.P. Morgan’s global head of macro markets, which includes FX, in an interview. Nearly half of the bank’s clients using the J.P. Morgan Markets platform are millennials, Mr. Rohrbaugh added. “Based on how they interact in their whole lives,” he said, “we want to be able to offer anything they can get on desktop, on mobile, in a user-friendly way.” The ability to trade forex on mobile, launched in 2014, allows users to track the progress of their trade by phone.
http://blogs.wsj.com/moneybeat/2017/04/05/behind-j-p-morgans-100-million-cell-phone-trade/