Quote from mtb4u:
It's hard to know over the internet, but I'm a pretty austere and hard-working guy...I don't drop attitude unless it's needed, and when somebody is explaining, I shut my mouth and listen. I assure you that any attitude you sensed was poorly communicated respect.
In fact, I've set a note to rent Boiler Room first thing tomorrow.
Cheers!
:Edit:
I'm not a trader, and I'm not looking for pennies. I'm a mathematician trying to get a better grasp on the markets. I have no intention of purchasing penny stocks, but I do have an intention to learn more about why I shouldn't purchase them.
OK Then, My Bad.
This brings me back to my original answer, or opinion.
Lack of liquidity. You might find it easy to purchase a position in a penny stock but very hard to sell, at least hard to sell at your price.
Huge spreads. See above paragraph.
Lack of institutional following. Most people buying them are buying on a hope and a prayer. There is nothing driving the price in any direction. This make traditional technical analysis very unreliable therefore how do you time your entry or exits.
As for your last statement, it's not that you SHOULDN't but them. It's just that you should know all of the above before buying them and don't have great expectations. Know that your position is hardly more than a lottery ticket.