According to data compiled by S&P Global Market Intelligence, the stock of upstart financial services company Robinhood Markets (HOOD 8.36%) was rising by more than 11% week to date as of early Friday morning. One key reason for this was a media report about the company's apparent embrace of current financial technology to build a cross-continental trading system.A new method of international securities trading?Toward the end of Wednesday's trading session, Bloomberg reported that Robinhood is aiming to bui ...