Let's just say that the onslaught of companies offering commission-free stock trades hasn't slowed down the booming discount brokerage industry much. Ameritrade (NASDAQ:AMTD) is checking in with its November figures, and the defections are few. During the month, Ameritrade signed up 32,000 new accounts while closing just 12,000.

As it stands, Ameritrade has 6.2 million client accounts that combine for a whopping $276 billion in assets. The company averaged 248,000 client trades a day last month. That's a figure that begs for more color. The active traders are naturally good news for a company that profits from each transaction, and that 248,000 figure compares nicely with 232,000 in October and 162,000 in November of last year.

As is usually the case, this trend also bodes well for rival discounters such as Charles Schwab (NASDAQ:SCHW) and E*Trade (NYSE:ET). It also leads one to wonder whether there is much of an impact from companies offering free stock trades. Whether it's Zecco.com or the intriguing offer from Bank of America (NYSE:BAC) to waive commissions through its retail brokerage division for those with at least $25,000 in assets at the bank, discount-brokerage accountholders are apparently not ready to be bought.

Maybe it's that nervous investors are waiting to see whether Zecco is the real deal. Maybe the tantalizing Bank of America offer is tempered by the perceived notion of lower yields on that $25,000 minimum -- or perhaps the Bank of America promotional push is working well, only that it's drawing folks out of more conventional full-service firms instead.

Then again, maybe it's that the entire retail brokerage sector is expanding. Whether it was the market racing to new highs or individual feats like Google (NASDAQ:GOOG) hitting the $500 mark, it felt pretty good to be a shareholder last month. Let's hope the holiday blues don't kick in, just as the brokers are starting to enjoy the party.

What's that? You're still unsure about whether or not you should get a new broker? Get thee to our Discount Broker Center to learn more and compare some sponsored commission schedules.

Schwab is a Stock Advisor recommendation, and Bank of America is an Income Investor selection.

Longtime Fool contributor Rick Munarriz has been trading exclusively through discount brokers since 1990 but he does not own shares in any of the companies in this story. He is also part of the Rule Breakers newsletter research team, seeking out tomorrow's ultimate growth stocks a day early. The Fool has a disclosure policy.