Tahvil is a financial instrument used in investment and finance, representing a type of debt security. When an individual or organization purchases a tahvil, they are essentially lending money to the issuer, which could be a government or corporation. In return, the issuer promises to pay back the principal amount along with interest over a specified period. Tahvils are often considered a safer investment compared to stocks, as they provide fixed interest payments and return the principal at maturity. They are commonly used by investors seeking stable income and lower risk, making them a popular choice in financial markets.