I generally only report annual figures, even if interim are available. For our underwriting, we may consider interim figures from a trend perspective, but run the ratios off of the year end figures. In cases like you describe where the GAR code would be different if we used interim figures, I just make a note that we used the previous full year figures in our underwriting, just in case an examiner picks up that file.
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All opinions are my own, not my employer's