TSP - Splitting my holdings to 2/3 F, 1/3 G

Well, in a previous quote, back on May 24th 2011, $DWCPF was at $699.06. Today is September 30th 2011 and $DWCPF is at $559.01, a 16% loss in a few months. Well, I've done pretty lousy with a lot of investments, but praise Jesus, this time I avoided this particular hit.

I've spent the last few months in the G fund, which pays out about as well as looking for lost dimes on the sidewalk. But you know what? I'll take a 1% gain over a 16% loss any day. However, it's pretty hard to plan on a retirement income from a 1% investment.

Looking at the TSP's historical rates of return, the F fund, which is mostly bonds, has been paying out in the 5% range, even through the 2008 collapse. With the US getting a beat-down in the S&P ratings, it is an inevitability that the fed, state governments, and municipalities will be paying more for borrowed money. So, I'm expecting the F to actually improve it's rate of return over what will likely be a moribund season for the stock market.

update 03 Oct 2011: I thought I went in half F half G, but when I got the confirmation letter, it was 2/3 F, 1/3 G.