2 years later after start of thread and bonds have underperformed t-bills by 4%/yr and SPY by 8%/yr as the index's yield has increased from 3.5% to 5.25% (actually yields more since that's YTW and MBS will yield more than their YTW)
I'm continuing to plow the entirety of my 401k into bonds and have recently started to buy long term tsy's on margin in my taxable (having sold most of my IG corporates after the late 2023 rally).
credit risk free MBS >6%, LT tsy's approaching 5%. good stuff. I'm a buyer. no corporates. IG spreads way too low in my opinion.
not for everyone but if you buy say 30% in LT tsy's at 4.8% on margin at interactive brokers, at top federal tax rate, you're making 3% after tax yield, fund w/ 6.2% margin and you have negative carry of 3% on 30% of your portfolio. At constant yields you lose 90 bps/yr on the portfolio. But in a recession where rates drop just 1%, you get 30% of your portfolio going up 20%, 2% =42% for 600 - 1200 bps of PnL when you want it most from liquid monetizable instrument. if rates go up another % you lose 15% on your 30% / -450 bps. almost no mgn requirement.
JPow is making bonds great again.