How Do I Know if Zero-Coupon Bonds Are for Me?

I was recently looking into zero-coupon bonds as a means of diversifying my portfolio. My knowledge of bonds is fairly basic, so I need a handle on what's a solid move for someone in his mid-20s who wants to add bonds to his portfolio. With the market becoming increasingly volatile, I want to lock in a steady return. Basically, should I be considering a zero-coupon bond fund, or maybe buy a zero straight up?

-- Patrick McNamara

Patrick, ...