I have two main thoughts on the market today. The first is that the bull market is healthy as a horse, and it will remain healthy until enough people stop arguing with it, questioning it and simply denying it. The second is that market leadership is probably beginning to narrow, as the identity of the greatest growth stories becomes clearer. Last Friday, for example, brought an awesome 23% jump in Amazon.com (AMZN), the result of a crackerjack earnings report. In short, Amazon.com is selling an enormous (but secret) umber of Kindle e-book readers, and they’re very profitable. What gets...