Charles Schwab Corp. /zigman2/quotes/201281754/composite SCHW +0.43% is in talks to buy TD Ameritrade /zigman2/quotes/207561492/composite AMTD +0.64% , CNBC reported , citing an unnamed source. The initial CNBC report said a deal could be announced as early as today. Fox Business separately reported Schwab will agree to pay $26 billion . The sector has been pressured of late by the move to no-fee commissions.





