as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
summarize what is the consumer price index (cpi).
user
the consumer price index (cpi) is a measure of the average change in prices over time that consumers pay for a basket of goods and services. it is calculated by measuring the changes in prices of a basket of goods over a period of time. the cpi is used to measure inflation and guide monetary policy decisions.
assistant