Rankings drop, but only one term

[MNKid15]

Has anyone experienced a significant drop on just one term? I have about 10 terms that I am constantly monitoring and 9 out of 10 are unchanged or even improved,  but 1 term was #1 and is now #11. Curious if anyone has experienced anything similar. I originally thought it was "Panda", but why wouldn't all my terms be affected??

[ShaMenz]

I have seen changes like this where it appears that a competitor has been spurred by being pushed out of the number 1 or 2 spot to take a look at their optimization for that particular term.

Something else that could possibly affect just one keyword is the mix of anchor text in your link profile. There is some great discussion of this in the latest Whiteboard Friday - [Beyond Exact Match Anchor Text to Next Generation Link Signals.](Beyond Exact Match Anchor Text To Next Generation Link Signals - Whiteboard Friday "Beyond Exact Match Anchor Text") It might be worth taking a look at your link profile to see if there is any obvious difference in the mix of terms for the keyword that has changed.

Hope that helps,

Sha