The recent turmoil on financial markets has made evident the importance of efficient liquidity risk management for the stability of banks. The measurement and management of liquidity risk must take into account economic factors such as the impact area, the timeframe of the analysis, the origin and the economic scenario in which the risk becomes manifest. Basel III, among other things, has introduced harmonized international minimum requirements and has developed global liquidity standards and supervisory monitoring procedures. The short book analyses the economic impact of the new regulation on profitability, on assets composition and business mix, on liabilities structure and replacement effects on banking and financial products.