Yeah this is a good portfolio management technique, except I hold 20% in cash instead (MMF, housing loan accounts, SSPN, etc), rather than buy bond funds. I just feel like there are enough instruments that provide more steady, less-volatile, risk-free returns than buying bonds.

Happy to hear a different perspective on this of course.

Why so much allocation to ex-US by the way? I know the usual answer is diversification but reading some of the Boglehead forums out there, there's a school of thought for 100% US allocation as companies in those baskets would have global exposure anyway. And also US index has been outperforming international for the last 10-15 years, I believe.

My index portion of my portfolio right now is 100% VTI. My only non-US exposure is through Stashaway ETFs.