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Comparing current PE to mean PE can allow you to see if DexCom Inc may be undervalued based on PE ratio.

* Total of 954 data points since 01/08/2006.

** From 01/08/2006 we changed 313 data points that were under -50 PE to -50 and 223 data points that were over 100 to 100. This helps smooth edge cases where companies had extreme PE ratios during certain periods. Removing these data points completely caused new issues with certain companies.