An additional question: If I look at an annual statement from TSP, it shows beginning balance, contributions/additions, withdrawals/deductions, interfund transfers, investment gain/loss, and ending balance. It also shows "Your 1-Year Rate of Return". How do I use the figures that are provided in the statement to get the 1-Year RoR that the statement shows? I wanted to use this to calculate my 2014 value, but my #s don't add up for the 2013 correctly to the percentage it shows.
I was doing: (final balance - contributions/additions - minus withdrawals/deductions) / starting balance * 100.
However that shows a higher 1-Yr. RoR (about 8% higher), so that is obviously incorrect.
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