Put-Call Parity

Definition of 'Put-Call Parity'


A principle referring to the static price relationship, given a stock's price, between the prices of European put and call options of the same class (i.e. same underlying, strike price and expiration date). This relationship is shown from the fact that combinations of options can create positions that are the same as holding the stock itself. These option and stock positions must all have the same return or an arbitrage opportunity would be available to traders. Any option pricing model that produces put and call prices that don't satisfy put-call parity should be rejected as unsound because arbitrage opportunities exist.
 

Put-Call Parity

Investopedia explains 'Put-Call Parity'


The above illustration demonstrates a simple put-call parity relationship. Looking at the graph, we see that a long-stock/long-put position (red line) has the same risk/return profile as a long call (blue line) with the same expiration and strike price. The only difference between the two lines is the assumed dividend that is paid during the time to expiration. The owner of the stock (red line) would receive the additional amount, while the owner of the call (blue line) would not. However, if we assume no dividend would be paid to stockholders during the holding period, then both lines would overlap.



Filed Under: ,

comments powered by Disqus
Hot Definitions
  1. Treasury Inflation Protected Securities - TIPS

    A treasury security that is indexed to inflation in order to protect investors from the negative effects of inflation. TIPS are considered an extremely low-risk investment since they are backed by the U.S. government and since their par value rises with inflation, as measured by the Consumer Price Index, while their interest rate remains fixed.
  2. Gilt-Edged Switching

    The selling and repurchasing of certain high-grade stocks or bonds to capture profits. Gilt-edged switching involves gilt-edged security, which can be high-grade stock or bond issued by a financially stable company such as the Blue Chip companies or by certain governments.
  3. Master Limited Partnership - MLP

    A type of limited partnership that is publicly traded. There are two types of partners in this type of partnership: The limited partner is the person or group that provides the capital to the MLP and receives periodic income distributions from the MLP's cash flow, whereas the general partner is the party responsible for managing the MLP's affairs and receives compensation that is linked to the performance of the venture.
  4. Class Action

    An action where an individual represents a group in a court claim. The judgment from the suit is for all the members of the group (class).
  5. Retail Sales

    An aggregated measure of the sales of retail goods over a stated time period, typically based on a data sampling that is extrapolated to model an entire country. In the U.S., the retail sales report is a monthly economic indicator compiled and released by the Census Bureau and the Department of Commerce.
  6. Okun's Law

    The relationship between an economy's unemployment rate and its gross national product (GNP). Twentieth-century economist Arthur Okun developed this idea, which states that when unemployment falls by 1%, GNP rises by 3%. However, the law only holds true for the U.S.
Trading Center