Unless I'm missing something this is not available? Book sim's currently always run over the maximum possible date range. I would like to be able to run subperiod tests on books to check performance, correlations, etc. more easily than doing it in excel. This will also allow users to create groups of R2G's and only run a book based on trailing 3 months. Or 12 months, etc. And then see performance and correlations. Could be useful.

Please correct me if I can do this already. I don't see it?