42 million traded on the grey market today....for those of you who don’t know The grey market, also referred to as the parallel market, is a market where a product is bought and sold outside of the manufacturer's authorized trading channels. The grey market is where the unofficial trading of a company's shares, usually before they are issued in an initial public offering (IPO), happens.All Grey sheet trading is moderated by a broker and done between consenting individuals at a price they agree on. The only documentation that can be publicly found regarding the trades is when the last trade took place.• Shares of such penny stocks are privately held and restricted from being sold publicly unless such company files a 504 of Regulation D and meets basic qualifications; for instance, have a concrete plan of operation, and a certain number of private stocks being held for at least one year, and a planned sale of shares worth no more than $1 million. The benefit of the public offering of stock is to raise capital for operations.