http://blog.btcjam.com/post/88513714697/introducing-nar-a-useful-tool-for-successful-investors
What is Net Annualized Return?
NAR (Net Annualized Return) is the measurement of the performance of your total investment on BTCJam. It reflects the funds actually received each month.
You can now view your NAR of all your investments on BTCJam in your Investments page.
What makes NAR useful as an investor?
As an investor, you need to eat, sleep, breathe NAR. (Also, expected APR - see more here).
If you were a painter, the paint would be your invested Bitcoins, the brush would be BTCJam, and the NAR would be the painting. NAR is the most accurate measurement to monitor how you have grown your Bitcoins on BTCJam.
How does BTCJam calculate NAR?
To calculate NAR, the numerator is composed of interest received, plus late fees received, minus the amount in default then the result is divided by the total mature principal. The mature principal is the investment that has already a related payment or default.
For notes, your notes sold also affect your returns both positively and negatively. If you sold a note for 1, but invested 1.2, you will have a -0.2 of loss. If you bought a note for 0.1 and received 0.4 in payments you will have 0.3 in gains
http://i.imgur.com/rNgSei6.png
This is a live calculation so with every event that can change it is automatically performed.
BTCJam started making this calculation from April 1st, 2014, so this only reflects your return starting with funds invested on or after April 1st, 2014.
