NEW YORK (Reuters) - Online retail brokerage TD Ameritrade Holding Corp <AMTD.O> said some of its thinkorswim desktop trading platform customers were unable to log on for a second-straight day, as the ...

By John McCrank NEW YORK (Reuters) - Online retail brokerage TD Ameritrade Holding Corp (O: AMTD) said some of its thinkorswim desktop trading platform customers were unable to log on for a ...

NEW YORK — Online retail brokerage TD Ameritrade Holding Corp said some of its thinkorswim desktop trading platform customers were unable to log on for a second-straight day, as the S&P 500 hit a new ...