FICO Scoring Theory

[Anonymous]

After reading through these boards for the past several months, I have a question on FICO scoring.

Let's say I have a perfect credit file with an 800 score (I don't as you can see below).  One baddie hitting my report (say a collection) can drop my score by as much as 100 pts.  Then let's say that next month this is removed from my file.  My score will go back up to maybe 765 or 780, and in a few months it will reach 800 again.

If your score is just a snapshot of your credit file, then why doesn't your score jump right back up to 800 when the collection is removed?  All else being equal, that should happen.  But from what everyone says, it takes time to get back to where you should be. I don't understand that.  As long as the information of the collection is gone, the algorithm should calculate back to the original score.

[llecs]

If all things being equal, it will jump back to where it was before the baddie hit. But for most, not all things are equal. Much could have happened from Point A to Point B like a change in utilization, change in AAoA, bucket changes for some, and so forth.

During the fall, I had a CA pop onto EX and TU. My EX FICO dropped 103 points and my TU FICO dropped about 60 points. The CA soon departed and unfortunately EX did what they did, so I can't tell the change. But my TU FICO rebounded by 60 points. My util was the same and points returned to within 1-2 points.

[Anonymous]

Ah.  Thank you. 

From what I have read, I thought people were saying that it doesn't bounce right back.  What you say makes sense.