If you assemble your spreadsheet gradually and methodically you might be amazed by what a flexible and useful tool you'll be able to create. An investment spreadsheet is among the easiest, most flexible approaches to track and understand the operation of your financial portfolio. The spreadsheet generated a array of discoveries. It will then develop an image of your portfolio's performance over time. The free spreadsheet is easy to get for download here. The downloadable spreadsheet is created in the template used to do non-linear regression using Microsoft Excel.