Hardly living and dying with this stock, and no the path has actually been LINEAR with MF, considering it nose dived for a couple MONTHS!
That said, a 10 to 15% single day decline is hardly the norm. And MF actually did better than most of it's competitors in the same sector for the same period, this making today's action even more disappointing!
MF had been outperforming strongly for a couple of months so you need to keep that perspective, particularly in the context of an overall market melting down to new lows. The small/independent FCMS are doing even worse today than the overall XLF sector esp the large banks), and MF just so happens to be the worst performing of the bunch (but perhaps MF was due for a couple days like this since it also had several days of being one of the best performers. The path to recovery is not linear.)
On a more personal note, you might want to consider diversifying your holdings a bit more. Right now you seem to be living and dying on a daily basis with this stock.