I wonder if the value going down is like checking on your credit rating. I was told by a bank manager several years ago, the more you check on your credit rating, they may drop your score a .1 or .2. So the wife and I checked it once about a year ago, and since it was fine, never checked it again.
This is the only site like this that I ever log on to. I'm registered at a couple others, but never seem to think of them. gypsyman