American Career Centers (ACCI)

[EastCoastCdn]

http://www.investopedia.com/terms/w/warrant.asp

Hope this helps, in Canada warrants mean dilution
When warrants are issued they can be converted based on the exercize price. I bought some in a stock what was trading at .30 by the time the warrants were ready to be exercized the stock was trading at the erercize price of .10 and shrotly after the price tanked to .03 cents on the conversion. The warrant offering was a disaster and trying to convert at a 66% loss the offering did not make the company any money.Administration fees were about 12 million based on proxies and issuance.

In my experience they were terrible, on the Canadian Junior exchange they are used often and the stock usually tanks. I am not sure about larger cap stocks.