Securitization is the process of taking illiquid assets like mortgages, student loans, or auto loans and transforming them into tradable securities. This is done by pooling many assets and issuing securities backed by those assets, making the assets more liquid. For example, a mortgage-backed security bundles many mortgages together and issues securities of varying risk levels. This provides liquidity to the original illiquid assets and allows various investors to invest based on their risk tolerance. Securitization has been used in India since the early 1990s, with the largest deals involving pools of auto loans or aircraft receivables.