“There are no fees for trading at Ameritrade. Wonder how they’ll like that. Be a lot of overhead and accounting on their part.”
All the work is done by computers.
Mailing confirmations is the only costly part and I have no idea if the transactions would be consolidated for mailing purposes.
I grew up in an era when stocks normally got traded in multiples of 100. My father bought his children odd lots from time to time. My father traded enough that his broker didn’t mind.
And in 99% of trade accounts today that is an email, i.e. no postage expense incurred.