Concluding Week 1, it is hard to make an accurate assessment of players because one week is such a small data sample. But we are going to keep up with this article weekly for the rest of the season, giving you an analysis on the players that are growing in value, and those that are plummeting in my rankings. Here are my Stock Up/Stock Down picks of the week.What?! Your league isn't hosted on Fantrax? Inconceivable! Look at the incredible features Fantrax offers and then compare it to the competition. It's pretty…