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www.investopedia.com

What does it mean when a stock symbol has a .PK after it?

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).