Watch Apple CEO Tim Cook explain unprecedented sales forecast drop in detailed interview

In a quite unprecedented move for the world's most profitable phone maker, Apple has just revised its forecast for its traditionally strong Holiday quarter, cutting its expectations for revenue by as much as $9 billion.

Apple CEO Tim Cook shared the news with investors first in a letter that you must have already seen. The gist of it is that Apple has sold less iPhones than expected and the biggest reason for the slow-down in iPhone sales is the Chinese market which is affected by a macroeconomic slowdown and the recent trade scuffle championed by President ...