Over the past year, Apple (NASDAQ:AAPL) investors have expressed concern over the company's declining market share in certain markets, including the all-important "Greater China" geography. New estimates from Canalys say the Mac maker has slipped to the No. 6 spot, while local competitors along with Samsung grow their respective shares.

In the following video, Fool contributor Evan Niu, CFA, and Eric Bleeker, CFA, discuss the different estimates that investors should be mindful of, as well as how to parse different figures.

Eric Bleeker, CFA, has no position in any stocks mentioned. Fool contributor Evan Niu, CFA, owns shares of Apple. The Motley Fool recommends Apple. The Motley Fool owns shares of Apple. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.