. periodically , scenarios are reviewed and updated to reflect changes in the firm 2019s risk profile and economic events . along with var , stress testing is important in measuring and controlling risk . stress testing enhances the understanding of the firm 2019s risk profile and loss poten- tial , and stress losses are monitored against limits . stress testing is also utilized in one-off approvals and cross-business risk measure- ment , as well as an input to economic capital allocation