Rebalance from GNMA or Total Bond?

[TromboneAl]

For my rebalancing, I need to move a big chunk from bonds to stocks. I could do it from either the Total Bond Index fund (5.13% return in 2008) or the GNMA fund (6.98% return in 2008).

I'd normally move from the GNMA, since it had the higher return, but perhaps that's a better thing to have in the current economic environment?? Perhaps it doesn't make any difference.

Thoughts?