JTH
Well-known member
4. Is it ever possible to recover what the PIP would have been if I ever missed checking a month's report?
Unfortunately, no.
Anything is possible if you are determined enough, but it requires a great deal of work...
View attachment 26652
Personal Investment Performance (PIP) — The rate of return earned by your entire account during the 12-month period ending on the date indicated on your annual statement or on your Account Balance page of the TSP website. The PIP is a time-weighted return that has been calculated using a modified-Deitz method (a method used by many financial institutions and an industry standard). The PIP adjusts for the distorting effects of cash flows into or out of your account. It is an estimate; therefore, your PIP may not be the same as the 12-month performance of the TSP funds, which are time-weighted returns.
The modified Dietz method[1] is a measure of the historical performance of an investment portfolio in the presence of external flows. (External flows are movements of value such as transfers of cash, securities or other instruments in or out of the portfolio, with no equal simultaneous movement of value in the opposite direction, and which are not income from the investments in the portfolio, such as interest, coupons or dividends.) To calculate the modified Dietz return, divide the gain or loss in value, net of external flows, by the average capital over the period of measurement. The result of the calculation is expressed as a percentage rate of return for the time period. The average capital weights individual cash flows by the amount of time from when those cash flows occur until the end of the period.