Wall Street overwhelmingly believes President Obama will and should pick Janet Yellen to be the next chairman of the Federal Reserve, according to a survey. Preliminary results of the CNBC Fed Survey for July show 70 percent of the 40 participants who responded believe Obama will pick Yellen, currently, the Fed's vice chair, to replace current Chairman Ben Bernanke, whose term is up in January. Just 25 percent believe it will be the former Treasury Secretary Larry Summers. (Read more: Battle of the sexes in choice for new Fed leader) Yellen also beats Summers when CNBC asks participants who the president should ... (full story)