PORTAL(redirected from portal vein obstruction)
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A trading platform operated by NASDAQ of closely-held companies and other companies for investment by extremely high net-worth individuals. This market is largely exempt from the requirements of the Sarbanes-Oxley Act. In 2007, the Portal Market required an individual to have a minimum net worth of $100 million to qualify to trade on it.
A NASD trading system for unregistered foreign and domestic securities.