Meanings of private bonds in English

I have a number of private bonds that I'd like to convert.

It would be as if a government guarantee were obtained for private bonds.

Overstock has already issued private bonds on the system, and TØ has built a separate service that oversees stock loans.

Then she spent the next few hours visiting nine private banks, where she distributed some of the private bonds from the Cayman Islands.

The bonds, however, are expected to be bigger in size and more liquid than private bonds from small- and medium-sized enterprises and ChiNext-listed companies.