I've chosen some financial news tonight. There are those in Washington who would like you to assume that all is well in the banking and corporate structure. Yet I have a video that I'll get to that will explain this in more detail.But first, as and explainer...Repo is Wall Street's big year-end worry. Why?(Reuters) - The $2.2 trillion (1.7 trillion pounds) repurchase agreement market - part of the inner workings of the U.S. financial system - is facing what could be another strain as the year comes to a close. That could have wider implications than just Wall Street.