First, lets go to the nyse where sue herera is standing by. The markets improving a little bit right now. Well off of our worst levels of the trading session. Still in the red, however. The markets right now show the Dow Jones Industrial average off 71 points onts trading day. The s p 500 is down about 6 3 4. Nasdaq composite down better than 1 1 2 points. Meantime our top story, that change of leadership at securities and exchange commission. Mary shapiro is stepping down as head of the s. E. C. And president obama is designating Commission Member elise walter as her replacement. Eamon javers is in washington with the details. Reporter this is a bit of a surprise announcement. A lot of other names had been speculated over the past couple of days here on who might succeed mary shapiro over at s. E. C. But the tap goes to elise walter today. She is a sitting s. E. C. Commissioner now. That means that the president will not have to face a bruising confirmation battle up on capitol hill f