PORTAL(redirected from portal obstruction)
Also found in: Dictionary, Thesaurus, Medical, Legal, Encyclopedia.
Related to portal obstruction: portal of entry, portal vein obstruction
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.