Bond ladders are almost exactly the same as CD ladders. Bonds and CDs are almost exactly the same thing, mathematically.
The tax treatment is a tiny bit different. T-bill interest is exempt from state/local tax. CD interest is not.
Default risk is the tiniest bit different, but not by much. With the CD, there is some probability that the bank will fail, at which point you then need to wait for the gears of the FDIC to slowly turn to pay you your CD insurance. The FDIC actually doesn't have that much money, so in a sufficiently large bank run the Federal Reserve will have to backstop it. On the other hand, you can just buy a T-bill directly from the Treasury, which is also backstopped by the Fed. So there are some additional middlemen in the case of the CD. Maybe that's good -- more failures in a row are necessary before you get to the Fed. Maybe that's bad -- there are more parties and more bureaucracy involved in the unlikely event of a bank failure. I think you might as well go straight to the Treasury for the high rate and better tax treatment.
(Or I'd plow it into the S&P 500 because T-bills ain't never gonna outpace inflation, no matter what they say the numbers are.)
The tax treatment is a tiny bit different. T-bill interest is exempt from state/local tax. CD interest is not.
Default risk is the tiniest bit different, but not by much. With the CD, there is some probability that the bank will fail, at which point you then need to wait for the gears of the FDIC to slowly turn to pay you your CD insurance. The FDIC actually doesn't have that much money, so in a sufficiently large bank run the Federal Reserve will have to backstop it. On the other hand, you can just buy a T-bill directly from the Treasury, which is also backstopped by the Fed. So there are some additional middlemen in the case of the CD. Maybe that's good -- more failures in a row are necessary before you get to the Fed. Maybe that's bad -- there are more parties and more bureaucracy involved in the unlikely event of a bank failure. I think you might as well go straight to the Treasury for the high rate and better tax treatment.
(Or I'd plow it into the S&P 500 because T-bills ain't never gonna outpace inflation, no matter what they say the numbers are.)