Well, I'm guessing you are in some kind of stock-challenge, I would advise you to look at penny stocks since they are highly volatile and that's apparently what you need (fast gains). Every night look up "penny stocks for tomorrow" and maybe choose 1 or 2. For example, for tomorrow morning I would advise you to buy AWSL AND SKTO since they're rising tomorrow for sure. If you are not allowed to buy penny stocks in the game, then invest in BIOF, AAPL and MSO. I would also suggest looking at LVS, which is currently on the rise, ( we are waiting for the IPO in Macau, China on this one) and it will take place in november so you can benefit from those gains too. I hope this helps you win the challenge. If you like my answer make sure to mark it as "best answer" :D... please give me feedback, so that I can further assist you in the future.
Have fun and make $ !!
The firms that have historically paid the highest returns are those that were close from bankruptcy and started reorganizing themselves, their stocks are usually cheap and their prices rise significantly as soon as they start implementing their new measures.
Right now you could buy some in Google (although it doesn't fluctuate much it's about to start selling Music on its search result pages).
My advise is to stay on top of the financial news, look for companies expanding as they will be worth more in the future. Also have in mind that there are 3 ways to make sure that you win in the stock market: Diversify your investments, develop expertise on the matter, and stay in it for a long time (10 years at least).
I hope that this was helpful.
K. Here is how you win the game. I am assuming that you are using a computerized tracking system to keep track of what you buy and sell. This system uses what are called level II quotes. These are prices that are 20 minutes delayed. Get a free trial of "real time" data or look at the most active stocks each morning before the market opens. Make trades before your tracking system catches up with the real price and you will easily win. Doesn't work in real life, but its a cheap way to look like a genius.