Day Trading

Source- http://jobsearchtech.about.com/od/careerplanning/l/aa032999.htm

Day trading is exactly what it sounds like. It's trading stocks constantly day by day. Day traders aren't investors, they are traders. They spend every hour the market is open glued to a computer watching every cent a stock rises or falls trying to decide the absoloute best time to sell, trade, or buy. Many day traders will only hold stock's just for minutes hoping the stock will go up just a few cents so they can make a nice little return.

"For example, at 10:00 AM a day trader might buy 1000 shares of stock XYZ just as the price begins to rise on good news, then sell it at 10:04 AM when it's up by 1/2 ($0.50). The day trader makes $500, minus commission. With today's cheap commissions of $29.95 or less per trade, that's a quick $440.10 or better, excluding taxes."

There are some day traders who trade up to 100 stocks a day. They are called SOES bandits. They will usually never hold a stock overnight and might only hold a stock for a few seconds.