A:

The .PK is an example of a suffix representing where the security is traded - an over-the-counter (OTC) network or an international exchange. The major U.S. exchanges such as the NYSE, Nasdaq and AMEX do not have suffixes. The .PK behind a stock simply means the stock in question is traded on the pink sheets (or the Pink Sheets Electronic Quotation service).

OTC Markets
The pink sheets service is a loosely regulated over-the-counter, decentralized market. There are few requirements to being listed on this network, as companies do not have to file with the SEC nor keep updated financial information. The only major requirement to being listed is to have at least one market maker, who must be registered with the SEC and a member of the NASD. The market maker is responsible for quoting the latest trading price of the stock on the pink sheets network. This is a highly speculative and risky place to invest. Investores would be wise to only invest what they are willing to lose.

The other suffix for an over-the-counter market is .OB. It means securities are traded on the OTCBB. This network is also one of high risk but is less risky than the pink sheets, as it is a regulated and has stricter listing requirements.

International Exchanges
Suffixes appended to the end of a stock symbol most often represent exchanges outside of the United States. For example, Canada's Toronto Stock Exchange is represented by a .TO, so if you see a stock symbol with a .TO suffix you'll know it trades on the TSX. All major foreign exchanges have a suffix designated to them.

Here is a list of a few international exchanges:

exchange.gif

A more complete list can be found here.

For further reading, see Getting To Know Stock Exchanges and our Stock Basics tutorial.

RELATED FAQS
  1. What is a "pink sheet" in the context of an OTC (over-the-counter) transaction?

    Read about pink sheets, the electronically driven over-the-counter market in which broker-dealers connect to trade the stock ... Read Answer >>
  2. What does it mean when a stock trades on the Pink Sheets or the OTCBB?

    The stocks of well-known companies such as General Electric and Microsoft trade on major exchanges such as the New York Stock ... Read Answer >>
  3. Can investors short sell pink sheet or over-the-counter stocks?

    Short selling is an effective trading strategy that can be employed to hedge the risk of a loss on an off-setting position ... Read Answer >>
  4. Why did my stock's ticker symbol change?

    When a ticker symbol changes it's usually not a good sign. Tickers of publicly traded companies generally only change for ... Read Answer >>
  5. How does a company move from an OTC market to a major exchange?

    The over-the-counter market is not an actual exchange like the NYSE or Nasdaq. Instead, it is a network of companies that ... Read Answer >>
  6. Why do some stock symbols have three letters while others have four? What is the ...

    Stocks found on the New York and American Stock Exchange will normally have symbols with three letters or fewer. On the other ... Read Answer >>
Related Articles
  1. Investing

    What are the Pink Sheets?

    Pink Sheets is a listing of over-the-counter stocks that are not listed on any established exchange such as the New York Stock Exchange or the NASDAQ.
  2. Managing Wealth

    Use Caution Trading Pink Sheet Stocks

    Pink Sheets stocks offer exciting opportunities to increase portfolio returns by large magnitudes in a short time. However, these opportunities come with significant risks. Investors need to ...
  3. Markets

    The Over-The-Counter Market: An Introduction To Pink Sheets

    Being early to a party may not be hip, but being early on a rising stock certainly is.
  4. Investing

    How To Play The OTC Pink Stocks

    The OTC Pink offers a variety of investment candidates including many good companies waiting to be discovered. Recently, the OTC Pink has worked hard to improve the service by tiering companies ...
  5. Investing

    Why You Should Understand The Stock Market

    Even if you don't invest a cent in stocks, you should still understand how the stock market works. Find out why.
  6. Markets

    Getting To Know The Stock Exchanges

    Here are the answers to all the questions you have about stock exchanges but are too afraid to ask!
  7. Markets

    Catching A Lift On The Penny Express

    The popularity of the penny stock market has grown, but are these stocks a safe bet?
  8. Investing

    A Look At Primary And Secondary Markets

    Knowing how the primary and secondary markets work is key to understanding how stocks trade.
  9. Markets

    What's an Over-The-Counter Market?

    The over-the-counter market is a decentralized market in which unlisted securities trade.
  10. Markets

    Trading Over the Counter

    OTC trades tend to be for smaller company stocks and debt securities. Debt securities such as bonds are generally traded by investment banks making markets for specific issues.
RELATED TERMS
  1. Pink Sheets

    A daily publication compiled by the National Quotation Bureau ...
  2. E

    A temporary fifth character suffix to a symbol for a stock traded ...
  3. Over-The-Counter - OTC

    Over-The-Counter (or OTC) is a security traded in some context ...
  4. Yellow Sheets

    A United States bulletin that provides updated bid and ask prices ...
  5. OTC Pink

    The lowest tier of the three marketplaces for trading over-the-counter ...
  6. Over-The-Counter Bulletin Board - OTCBB

    A regulated electronic trading service offered by the National ...
Hot Definitions
  1. Duration

    A measure of the sensitivity of the price (the value of principal) of a fixed-income investment to a change in interest rates. ...
  2. Dove

    An economic policy advisor who promotes monetary policies that involve the maintenance of low interest rates, believing that ...
  3. Cyclical Stock

    An equity security whose price is affected by ups and downs in the overall economy. Cyclical stocks typically relate to companies ...
  4. Front Running

    The unethical practice of a broker trading an equity based on information from the analyst department before his or her clients ...
  5. After-Hours Trading - AHT

    Trading after regular trading hours on the major exchanges. The increasing popularity of electronic communication networks ...
  6. Omnibus Account

    An account between two futures merchants (brokers). It involves the transaction of individual accounts which are combined ...
Trading Center