A computer-implemented method controls commercial transactions involving a portfolio of financial products by conducting business operations related to commercial transactions between a bank and consumer involving purchase and utilization of the financial products, collecting transactional data related to the financial products, and providing a centralized modeling and optimization tool to predict customer response to changes in an attribute of a financial product under evaluation based on the transactional data and to optimize the variable of the financial product under evaluation. The modeling and optimization tool is configurable to evaluate the financial products in the portfolio under KPIs and business rules selected according to the financial product under evaluation. The optimized variable is transmitted to the bank. The movement and utilization of the financial products between the customer and bank is controlled in accordance with the predicted customer response to changes in the optimized variable of the financial product.