Conversion / exercise of the warrants results in increase in share capital. Warrants may be traded on the stock exchange as a security separate from the debenture with which it was issued. Warrants usually have a longer lifetime as compared to options contracts which they closely resemble.
Depository receipts (DRs) are financial instruments that represent shares of a local company but are listed and traded on a stock exchange outside the country. DRs are issued in foreign currency, usually dollars. DRs allow overseas investors to easily invest in a company.
DRs are called American Depository Receipts (ADRs) if they are listed on a stock exchange in the USA such as the New York Stock Exchange or NASDAQ. If the DRs are listed on a stock exchange outside the US, they are called Global Depository Receipts (GDRs).
When DRs are issued in India and listed on stock exchanges in India with foreign stocks as underlying shares, these are called Indian Depository Receipts (IDRs).
Foreign Currency Convertible Bonds (FCCB) are issued by Indian companies and subscribed to by investors in foreign currency. They carry a fixed interest or coupon rate and are convertible into a certain number of ordinary shares at a preferred price.