Calendar Effect

DEFINITION of 'Calendar Effect'

A collection of assorted theories that assert that certain days, months or times of year are subject to above-average price changes in market indexes and can therefore represent good or bad times to invest. Some theories that fall under the calendar effect include the Monday effect, the October effect, the Halloween effect and the January effect.

BREAKING DOWN 'Calendar Effect'

Most of the evidence for these effects is anecdotal, although there is a slight statistical case to be made for some of them, which is more than enough to encourage some investors to place their faith in them.

Proponents of the October effect, one of the most popular theories, argue that October is when some of the greatest crashes in stock market history, including 1929's Black Tuesday and Thursday and the 1987 stock market crash, occurred. While statistical evidence doesn't support the phenomenon that stocks trade lower in October, the psychological expectations of the October effect still exist.

RELATED TERMS
  1. Black Thursday

    The name given to Thursday, Oct. 24, 1929, when the Dow Jones ...
  2. Weekend Effect

    A phenomenon in financial markets in which stock returns on Mondays ...
  3. Monday Effect

    A theory that states that returns on the stock market on Mondays ...
  4. Black Monday

    October 19, 1987, when the Dow Jones Industrial Average (DJIA) ...
  5. January Effect

    A general increase in stock prices during the month of January. ...
  6. October Effect

    The theory that stocks tend to decline during the month of October. ...
Related Articles
  1. Active Trading Fundamentals

    Capitalizing On Seasonal Effects

    We show you how to take advantage of periodic trends in the equity markets.
  2. Investing

    Making Sense Of Market Anomalies

    Stocks sometimes thwart the efficient market theory by showing some very unusual patterns.
  3. Budgeting

    The Greatest Market Crashes

    From a tulip craze to a dotcom bubble, read the cautionary tales of the stock market's greatest disasters.
  4. Options & Futures

    What Does Quadruple Witching Mean?

    In a financial context, quadruple witching refers to the day on which contracts for stock index futures, index options, and single stock futures expire.
  5. Professionals

    Is A Stockbroker Career For You?

    Becoming a stockbroker requires a broad skill set and the willingness to put in long hours. But the rewards can be enormous.
  6. Fundamental Analysis

    5 Basic Financial Ratios And What They Reveal

    Understanding financial ratios can help investors pick strong stocks and build wealth. Here are five to know.
  7. Fundamental Analysis

    5 Predictions for the Chinese Stock Market in 2016

    Find out why market analysts are making these five ominous predictions about the Chinese stock market in 2016, and how it may impact the entire world.
  8. Investing

    What Investors Need to Know About Returns in 2016

    Last year wasn’t a great one for investors seeking solid returns, so here are three things we believe all investors need to know about returns in 2016.
  9. Economics

    The Basics Of Business Forecasting

    Whether business forecasts pertain to finances, growth, or raw materials, it’s important to remember that a forecast is little more than an informed guess.
  10. Investing Basics

    How to Pick A Stock

    The first step in picking stock is to determine your goals.
RELATED FAQS
  1. What is finance?

    "Finance" is a broad term that describes two related activities: the study of how money is managed and the actual process ... Read Full Answer >>
  2. What is the difference between positive and normative economics?

    Positive economics is objective and fact based, while normative economics is subjective and value based. Positive economic ... Read Full Answer >>
  3. Where do penny stocks trade?

    Generally, penny stocks are traded through the use of the Over the Counter Bulletin Board (OTCBB) and through pink sheets. ... Read Full Answer >>
  4. Where can I buy penny stocks?

    Some penny stocks, those using the definition of trading for less than $5 per share, are traded on regular exchanges such ... Read Full Answer >>
  5. How does the stock market react to changes in the Federal Funds Rate?

    The stock market reacts to changes in the federal funds rate in various ways depending on where it is in the business cycle. ... Read Full Answer >>
  6. Why would a corporation issue convertible bonds?

    A convertible bond represents a hybrid security that has bond and equity features; this type of bond allows the conversion ... Read Full Answer >>
Hot Definitions
  1. Presidential Election Cycle (Theory)

    A theory developed by Yale Hirsch that states that U.S. stock markets are weakest in the year following the election of a ...
  2. Super Bowl Indicator

    An indicator based on the belief that a Super Bowl win for a team from the old AFL (AFC division) foretells a decline in ...
  3. Flight To Quality

    The action of investors moving their capital away from riskier investments to the safest possible investment vehicles. This ...
  4. Discouraged Worker

    A person who is eligible for employment and is able to work, but is currently unemployed and has not attempted to find employment ...
  5. Ponzimonium

    After Bernard Madoff's $65 billion Ponzi scheme was revealed, many new (smaller-scale) Ponzi schemers became exposed. Ponzimonium ...
  6. Quarterly Earnings Report

    A quarterly filing made by public companies to report their performance. Included in earnings reports are items such as net ...
Trading Center