To function properly, the abnormal return calculator (ARC) requires input files in a certain structure. The required structure is described on this instruction page and illustrated by sample input files.
We strongly recommend viewing these sample files with a text editor - this will show you the target structure and variable formats (e.g., the date format or the need to use a dot as the decimal separator). Viewing the files in spreadsheet software (e.g., Excel) is not recommended since spreadsheet programs interpret the data and may display for example the dates in your country scheme.
If you want to have the firm and market data files created for you, based on your request file, consider using our input data file creation service.