I have read so much here (and elsewhere) about the "beauty" of a "set-and-forget" 50/50 (or 60/40) asset allocation. Backward-looking analyses (of which there are as many as there are graduate students), all trumpet such allocations.
Indeed, these allocations (50% equites in a balanced equity fund and 50% in a balanced bond fund) are so ubiquitous that I call them "your parents' fund"). Conservative funds even suggest rotating to 40/60, or even 30/70, as one advances in age. The key is always fixed-income in that percentage to the right of the backward slash. Should it really be in bond funds?
To invest in bond funds, one must make a great leap of faith. First, in a rising-rate environment (in which we now appear to be), bond funds will take a "hit" in the short-term, but recover in the long-term. Which recalls the adage, "in the long-term, we are all dead". Second, in a rising-rate environment, will bond funds ever out-perform other alternatives in 401Ks, such as stable-value funds or in-service transfers to IRA CD ladders (if available).
I respectfully submit that folks suggesting asset allocations should look forward, not back. Performance based on the greatest bull run in history of the bond market is just that. That bubble has burst, if you hadn't noticed.
Mind you, I'm not suggesting a 30/70 asset allocation is all that bad an idea. What I AM suggesting is that the fixed-income be in laddered CDs (IRA or otherwise). The days of bond funds are over.