Subject: Income from BH subsdiarie debt
If you wanted to create an income stream with less volatility (rather than hold purely BRK equity), what of the BH subsidiaries' long-term (20-30 year) debt would you hold?

Berkshire Hathaway Finance
Berkshire Hathaway Energy
PacificCorp
Precision Castparts
Lubrizol
BNSF

Currently, BNSF 30 year debt pays a coupon of 5.2% and YTM of 5.46% as its selling to a discount (96.154)

Is there anyone doing this with their retirement portfolio?