Power Finance Corporation Limited : Rare profit making PSU?

I felt Power Finance was a good buy especially as compared to IREDA. My stand was, when both are in the same sector,i.e., fianancing power companies, why rate IREDA so high.
Power Finance is however in a downward tailspin, having fallen from ₹469 in Feb to ₹363 yesterday.
Anybody tracking it? The fall is because, like all the PSUs, it had gone up rather fast, and is saner now, or some fundamental reasons?
Disclaimer: Booked some loss yesterday, watching.