Macroeconomics - The Consumer Price Index & Inflation

Inflation is defined as an increase in the overall price level. Please note that inflation does not apply to the price level of just one good, but rather to how prices are doing overall. A consumer facing inflation that occurs at the rate of 10% per year will able to buy 10% less goods at the end of the year if his or her income stays the same. Inflation can also be defined as a decline in the real purchasing power of the applicable currency.

Consumer Price Index (CPI)
The CPI represents prices paid by consumers (or households). Prices for a basket of goods are compiled for a certain base period. Price data for the same basket of goods is then collected on a monthly basis. This data is used to compare the prices for a particular month with the prices from a different time period.

The inflation rate is computed by subtracting the CPI of last year's prices from the CPI value for this year, dividing that difference by last year's CPI value and then multiplying by 100.

So if the value of the price index for the current year is equal to 165, and last year's value was 150, the rate would be calculated as:

Inflation rate = (165 - 150) X100= 10

CPI Sources of Bias
The CPI is not a perfect measure of inflation. Sources of bias include:

·Quality adjustments - quality of many goods (e.g., cars, computers, and televisions) goes up every year. Although the Bureau of Labor Statistics is now making adjustments for quality improvements, some price increases may reflect quality adjustments that are still counted entirely as inflation.

·New goods - new goods may be introduced that will be hard to compare to older substitutes.

·Substitution - if the price goes up for one good, consumers may substitute another good that provides similar utility. A common example is beef vs. pork. If the price goes up, and the price of pork stays the same, consumers might easily switch to pork. Although the CPI will go higher due to the price increase in beef, many consumers may not be worse off. Also, when prices go up, consumers may effectively not pay the higher prices by switching to discount stores. The CPI surveys do not check to see if consumers are substituting discount or outlet stores.

Aggregate Supply & Aggregate Demand
Related Articles
  1. Financial Advisors

    Tips on Passing the CFA Level I on Your First Attempt

    Obtain valuable tips and helpful study instructions that can help you pass the Level 1 Chartered Financial Analyst exam on your first attempt.
  2. Financial Advisors

    Putting Your CFA Level I on Your Resume

    Learn techniques for emphasizing your CFA Level I status in the Skills and Certifications or Professional Development section of your resume.
  3. Professionals

    Investment Analyst: Career Path and Qualifications

    Learn how to prepare for a career as an investment analyst, and read more about how many professionals in the field progress during their careers.
  4. Professionals

    CAIA Vs. CFA: How Are They Different?

    Find out how the CAIA and CFA designations differ, including which professionals should seek either title based on their career ambitions.
  5. Professionals

    Equity Investments: CFA Level II Tutorial

    Chapter 1: Equity Valuation: Its Applications and Processes Chapter 2: Return Concepts for Equity Valuation Chapter 3: Industry Analysis With Porter's 5 Forces
  6. Professionals

    What To Expect On The CFA Level III Exam

    The Chartered Financial Analyst Level III exam, which is only offered in June, is the last in the series of three tests that CFA candidates must pass.
  7. Professionals

    What To Expect On The CFA Level I Exam

    Becoming a chartered financial analyst requires the passing of three grueling exams covering an array of topics.
  8. Options & Futures

    The Alphabet Soup of Financial Certifications

    We decode the meaning of the many letters that can follow the names of financial professionals.
  9. Professionals

    How to Ace the CFA Level I Exam

    Prepare to ace the CFA Level 1 exam by studying systematically.
  10. Personal Finance

    How To Choose A Financial Advisor

    Many advisors display similar skillsets that can make distinguishing between them difficult. The following guidelines can help you better understand their qualifications and services.
  1. Personal Financial Advisor

    Professionals who help individuals manage their finances by providing ...
  2. CFA Institute

    Formerly known as the Association for Investment Management and ...
  3. Chartered Financial Analyst - CFA

    A professional designation given by the CFA Institute (formerly ...
  4. Security Analyst

    A financial professional who studies various industries and companies, ...
  1. What are the differences between a Chartered Financial Analyst (CFA) and a Certified ...

    The differences between a Chartered Financial Analyst (CFA) and a Certified Financial Planner (CFP) are many, but comes down ... Read Full Answer >>
  2. How do I become a Chartered Financial Analyst (CFA)?

    According to the CFA Institute, a person who holds a CFA charter is not a chartered financial analyst. The CFA Institute ... Read Full Answer >>
  3. What types of positions might a Chartered Financial Analyst (CFA) hold?

    The types of positions that a Chartered Financial Analyst (CFA) is likely to hold include any position that deals with large ... Read Full Answer >>
  4. Who benefits the most from prepaid expenses?

    Prepaid expenses benefit both businesses and individuals. Prepaid expenses are the types of expenses that are bought or paid ... Read Full Answer >>
  5. If I am looking to get an Investment Banking job. What education do employers prefer? ...

    If you are looking specifically for an investment banking position, an MBA may be marginally preferable over the CFA. The ... Read Full Answer >>
  6. Can I still pass the CFA Level I if I do poorly in the ethics section?

    You may still pass the Chartered Financial Analysis (CFA) Level I even if you fare poorly in the ethics section, but don't ... Read Full Answer >>
Hot Definitions
  1. Black Friday

    1. A day of stock market catastrophe. Originally, September 24, 1869, was deemed Black Friday. The crash was sparked by gold ...
  2. Turkey

    Slang for an investment that yields disappointing results or turns out worse than expected. Failed business deals, securities ...
  3. Barefoot Pilgrim

    A slang term for an unsophisticated investor who loses all of his or her wealth by trading equities in the stock market. ...
  4. Quick Ratio

    The quick ratio is an indicator of a company’s short-term liquidity. The quick ratio measures a company’s ability to meet ...
  5. Black Tuesday

    October 29, 1929, when the DJIA fell 12% - one of the largest one-day drops in stock market history. More than 16 million ...
  6. Black Monday

    October 19, 1987, when the Dow Jones Industrial Average (DJIA) lost almost 22% in a single day. That event marked the beginning ...
Trading Center