Uh-oh.While not issuing and accusations just yet, the news from the FBI that Hillary Clinton has caused the major market indices to go from positive to negative territory on the day:Previously, Secretary Clinton had mostly got off this charge scott free, but it has left a mark that's been impossible to completely ignore in her debates against Donald Trump. Generally speaking, it's not my belief that politics and stock market activity are closely related, but traders can be easily frightened if they think something has been working in their favor. Will keep an eye on this development.