Q1 What information is contained in a bond indenture? What purpose does it serve?

Q2 Just to add to the fun, some are even called "hybrids," (convertible bonds, or bonds with detachable warrants) as they combine both debt and equity components. How does the accounting treatment differ for the two hybrid securities?

Why is the accounting treatment different?

Why would an investor want one of those?

Why would a company want to issue one of those?