For some strange reason, preferred PYI is going down - not very strong, but consistently last days (including today)

1. Its parent company TWX posted today good report and good future outlook
2. In a week PYI will have nice ex-dividend day ($0.75 pay for half-year)
3. It has good A2/BBB rating, and Time Warner is far-far from all these bankrupcies etc.

I do not understand why last week we are down on a few percents. maybe it's a good buy