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 derivative?

    A derivative is a contract between two or more parties whose value is based on an agreed-upon underlying financial asset, ... Read Full Answer >>
  2. Do penny stocks trade after hours?

    Penny stocks are common shares of public companies that trade at a low price per share. These companies are normally small, ... Read Full Answer >>
  3. Do penny stocks pay dividends?

    Because of the small market capitalization and revenues typical of most penny stocks, there are very few that offer dividends. ... Read Full Answer >>
  4. Can you buy penny stocks in an IRA?

    It is possible to trade penny stocks through an individual retirement accounts, or IRA. However, penny stocks are generally ... Read Full Answer >>
  5. 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 >>
  6. 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 >>
Related Articles
  1. Investing Basics

    How To Invest In Penny Stocks

    Penny stocks are highly speculative and very risky for many reasons, including their lack of liquidity and small market capitalization.
  2. Mutual Funds & ETFs

    The 5 Best US Small Cap Value Index Mutual Funds

    Find out which index mutual funds do the best at investing in small-cap value stocks for higher potential returns at the lowest cost.
  3. Stock Analysis

    The Top 5 Entertainment Penny Stocks for 2016 (SIRI, ZNGA)

    Learn more about what types of businesses comprise the entertainment industry, and discover five entertainment penny stocks for investors to consider in 2016.
  4. Stock Analysis

    The Top 5 Semiconductor Penny Stocks for 2016 (ACLS, CAMT)

    Learn more about the semiconductor industry, and discover five penny stocks that investors seeking exposure to this industry should consider in 2016.
  5. Stock Analysis

    The Top 5 Financial Penny Stocks for 2016 (CPSS, ASRV)

    Learn about some of the most promising penny stocks in the financial services sector that investors can consider adding to their portfolio for 2016.
  6. Stock Analysis

    The Top 5 Micro Cap Biotechnology Stocks for 2016 (BSTC, OSIR)

    Discover some of the most promising micro-cap biotechnology stocks that investors can consider for their 2016 investment portfolio.
  7. Stock Analysis

    The Top 5 Silver Penny Stocks for 2016 (LODE,AG)

    Learn about five of the top silver penny stocks and why investors may want to consider adding them to their investment portfolios in 2016.
  8. Stock Analysis

    The Top 5 Retail Penny Stocks for 2016 (TWMC, DXLG)

    Find out which retail stocks trade for less than $5 a share. Learn about bargains that can avoid bankruptcy and produce nice returns for investors.
  9. Mutual Funds & ETFs

    3 Eaton Vance Mutual Funds with Long Track Records (EV)

    Discover three Eaton Vance mutual funds with long track records. Review brief descriptions about each fund's management and performance.
  10. Mutual Funds & ETFs

    The Top 5 Small-Cap Core Mutual Funds for 2016

    Discover five mutual funds that specialize in investing in core small-market capitalization stocks traded on U.S. stock exchanges.
RELATED TERMS
  1. Penny Stock Reform Act

    A securities act enacted in 1990 that sought to clamp down on ...
  2. Form 211

    1. A form that must be completed by a market maker and filed ...
  3. Over-The-Counter Market

    A decentralized market, without a central physical location, ...
  4. OTC Markets Group Inc.

    The owner and operator of the leading U.S. inter-dealer electronic ...
  5. OTCQB

    The venture stage marketplace for smaller or early-stage companies ...
  6. OTCQX

    The top tier of the three marketplaces for trading over-the-counter ...
Hot Definitions
  1. Flight To Quality

    The action of investors moving their capital away from riskier investments to the safest possible investment vehicles. This ...
  2. 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 ...
  3. Ponzimonium

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

    A quarterly filing made by public companies to report their performance. Included in earnings reports are items such as net ...
  5. Dark Pool Liquidity

    The trading volume created by institutional orders that are unavailable to the public. The bulk of dark pool liquidity is ...
Trading Center