Personal Finance and Investing

[font color = blue]>> My assumption is that if I buy 30 years now paying a bit under 3%, then if prevailing interest rates rise so do my yields. Is this true or do they act like fixed rate CDs? <<[/font]

Nope, they are fixed rate, at least I haven't ever heard differently. Thus those bonds will lose value as prevailing interest rates rise on new bonds. Though if you hold them to maturity, you will get your principal back, plus in the meantime you've gotten 30 years of those nearly 3% interest payments (about 1.5% paid twice a year).

[font color = blue]>>I'd like if possible to say buy $20k of 30 year treasuries and then add perhaps $1k a month to that, accelerating as expenses allow, and keep reinvesting interest payments until I need to withdraw. <<[/font]

Well, this way, as prevailing interest rates rise, you will be purchasing new bonds having those new higher interest rates.

I guess you can buy them at TreasuryDirect.gov - a place to check anyway.

[font color = red]Edited to add:[/font] https://www.treasurydirect.gov/indiv/products/prod_tbonds_glance.htm

I'm not an expert.