I just did the math using a spreadsheet. Assuming 2.3% COLA, 6% growth in my portfolio, comparing the sum of present value for three different scenarios:
1. Take it now.
2. Delay to FRA
3. Delay to age 70.
Projected out 30 years, 1 is better than 2, 3 is better than 1. The difference is very small.
If FedCo does as I expect, and decrease my benefit in the future, then scenario 1 wins.
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