Like blue-chippers and Internet dot-bombs, stocks can rise and fall almost overnight.
That is why we now call our lists power rankings instead of stock exchanges - because recent peformance is only part of the equation.
We'll run the power rankings every week to update our picks for the top players at each position.
The rankings will measure a player's overall skill level and game-day performance.
One awful game won't necessarily cause a player to free-fall down the list. For example, Tyler Hansbrough is certainly one of the best players in the country. If he struggles against Duke, he is still a great player. He may drop a few spots, but Hansbrough is a Carolina blue-chipper who should remain near the top of the charts.
Conversely, one outstanding game won't automatically put a player on the list if he hasn't performed well all season.
Click the links below to view our initial 2006-07 lists and check back each week to see whose is on the rise or on the decline.