You can buy Gazprom or another Russian energy stock, Lukoil (LUKOY), in the pink sheets, but another way to get it is through the Market Vectors Russia ETF (RSX), which Moro personally owns.

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The recent problems compelled the Nasdaq stock market to delist Comverse shares earlier this year, sending them to the Pink Sheets on Feb. 1.

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Stocks in the Over-The-Counter market are quoted on systems like the OTC Bulletin Board, an electronic quotation system, and the Pink Sheets, which is not registered as a stock exchange and is named for the color of paper on which its listings of price quotes for companies have historically been printed.

FORBES: SEC Shuts Down Trading Of 17 Penny Stocks