Apple Inc. (NASDAQ:AAPL) priced its first foldable iPhone below Wall Street’s expectations.

For the analysts covering the stock, that is exactly the problem.

The $1,999 iPhone Duo drew broad praise. Apple unveiled it Wednesday at the “Surprise and Shine” event, the first major product launch under CEO John Ternus.

The worry is what cheaper-than-expected phones do to Apple’s profit on each device.

BofA Likes The Duo, Not The Math Behind