Fidelity does not rate. It is showing a total of 7 analyst ratings, and the average of those 7 is 6.3 out of 10 which places it just inside the Neutral rating range.
My suspicion is that AGNC has advanced to a significant premium above its book value. Profits are being taken by some large holders and likely short sellers are taking advantage as well. Whether it has anything to do with the possibility of a dividend reduction, who knows.