Commercial papers (CP) are short-term, unsecured promissory notes issued by financially stable companies, with maturity periods ranging from 7 days to one year. Eligible issuers include corporates and financial institutions, and they can be issued in denominations of Rs. 5 lakh or more, providing a quick and cost-effective method for companies to raise working capital. While CPs offer advantages like lower borrowing costs for issuers and potential higher returns for investors, they also come with risks due to their unsecured nature and are primarily available to blue-chip companies.