Subject: Has Buffett written about YTM discounted bond math
I recall at some point that Buffett has written about not buying deeply discounted long bonds because YTM means you're not being paid until 30-50 years later when the principal is returned at 100% versus the 50-60-70% discount that the bonds were purchased at.

Does anyone have a link or recall when this was discussed - letter to shareholders or AGM?

Thanks in advance.