I guess my questions remain unanswered. I mean "What are the differences and why 140 shares is allowed while 40 shares is not allowed?" Why does SEC think they are different? And what are the consequences?
There have been situations over the years where <100 share orders were given preferential treatment with respect to order handling and subsequently exploited by professional traders. Not really applicable these days, but the rules are still in effect. Google SOES Bandits for an example.
That's pretty much why.... Also, retail firms give great "deals" on market orders ($7.00 per trade etc.)....they love to see small orders....think about it. That would be $14.00 per hundred shares.... Don
Well if you trade with retail like interactivebrokers the commision r not that mch I understand the OP ideas IF he has a $25000 account he does not want to take that much risk Size does matter especially when you are trading 10 different shares and you want to alocate them in different sector let say i want to buy aapl 20 shares appl 40 shares rimm 50 shares etc you,r chance are more , then putting everything in 1 basket