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

* Total of 909 data points since 11/19/2006.

** From 11/19/2006 we changed 75 data points that were under -50 PE to -50 and 132 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.