Wall Street's consensus view on Apple's price target is too high, despite the average estimate falling in recent months, Robert W. Baird senior analyst Will Power said Friday.

Power said the firm has become more cautious on the stock in the near to medium term, in part on the view that iPhone unit shipments will fall about 2 percent in fiscal year 2017 from 2016. The Street is expecting mid-single-digit growth, he added.