The Asymco Mobile Performance (AMP) index is an unweighted average of:
- Share of all handset units sold (global)
- Share of smartphones
- Share of value (revenues)
- Share of profits
For major phone vendors. The raw data for each share is shown in the following charts (note change of vertical scale: each gridline represents 10%).
Note that the vendors are arranged in a particular way: top row are entrants, bottom row are incumbents with late incumbents from Korea arranged in the middle.
Taking the average of each of the lines above, the unweighted share index (Units, Smartphones, Value and Profit) is shown below:
And here it is in sparklines:
Like many indices, this is a generalization that measures a section of reality. The value is in its use as a benchmark and trend analysis.
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