GM shares, which debuted on the New York Stock Exchange on Thursday after pricing its initial public offering a day earlier at the very high end of its range, accounted for 7.5% of the online broker's total trades for the day, according to an email from a TD Ameritrade spokesman.
The spokesman wouldn't elaborate on how the GM shares compared to other high volume stocks, such as Citigroup (C - Get Report), but did say the percentage was number one and "a good size," for the day.
-- Written by Laurie Kulikowski in New York. To contact the writer of this article, click here: Laurie Kulikowski. To submit a news tip, send an email to: email@example.com.