Asset backed securities represent a class of fixed income products, created out of pooling together assets, and creating bonds that represent participation in the cash flows from the asset pool.
For example, select housing, loans of a loan originator (say, a housing finance company) can be pooled, and bonds can be created, which represent a claim on the repayments made by home loan borrowers.
Such bonds are called mortgage-backed securities. In some markets like India, these bonds are known as structured obligations (SO). Assets with regular streams of cash flows are ideally suited for creating asset-backed securities.
Some of other structures are: (a) deferred interest bonds, where the borrower could defer the payment of coupons in the initial 1 to 3 year period; (b) Step-up bonds, where the coupon is stepped up periodically, so that the interest burden in the initial years is lower, and increases over time.
Warrants give the investors the right to buy shares of the company in the future. The number of shares that the warrant entitles the holder to subscribe to at a pre-determined date and price are specified at the time of issue.