Pushback on Vodafone's bond plans shows that investors are learning to just say no, even to investment-grade issues.

Proportion of euro-denominated corporate bonds issued by U.S. companies has skyrocketed as borrowing costs in Europe are more than 2 percent lower than in the U.S.

Borrowers rush to market ahead of possible Fed move.

Borrowers rush to market ahead of possible Fed move.

Decline reflects pullback by money-market funds amid low rates.

Decline reflects pullback by money-market funds amid low rates.

AIG sells debt maturing in 40 years, FedEx issues 50-year bonds.

AIG sells debt maturing in 40 years, FedEx issues 50-year bonds.