Where’s the old love, Apple?

Wall Street has turned viciously on its one-time iDarling. The rout in Apple’s share price — it fell nearly 2.7 percent on Thursday, bringing the damage since late September to 44 percent — has many wondering when, and where, all of this will end.

The answer, of course, is that no one really knows. Yes, Apple is slowing, as companies inevitably do. But Apple remains enormously profitable and the envy of corporations worldwide.

And yet Apple’s decline in the stock market has been so swift and so brutal that the development has begun to change the way investors view the company. Apple no longer looks like a sure thing.

It is a remarkable turn in one of the standout stock market stories of recent years. Only seven months ago, Apple’s share price raced above $700 to a record high, making Apple the most valuable company on the planet. By Thursday, the stock had sunk to $392.05, closing below $400 for the first time since late 2011.