 It's hard to say. I would suggest you need to know all the basics. You need to know all the basic fundamental analysis things, the price-earnings ratio, what the earnings reports look like, what the projections look like, how many analysts follow it. You need to know whether they're recommending to buy, sell, or hold. And then you have to put your own spin on it and look at the overall industry. Does this business make sense? Does it make sense in the future? Because remember, when you buy a stock, you're looking at it in a snapshot right now.