The reserve requirement is a key concept in the world of finance. It refers to the minimum amount of cash and liquid assets that banks must have on hand to cover their demand and time deposits. This requirement is set by the Federal Reserve and serves as a safety net for the banking system. It ensures that banks have enough funds to meet the needs of their customers, while also maintaining stability in the financial market. Understanding the reserve requirement is crucial for anyone looking to gain a deeper understanding of the financial world.