A market in the USA operated by the National Association of Securities Dealers Inc (NASD) since June 1990 for qualified investors to trade privately in unregistered international securities.

• stripped bond
• strong-form market efficiency
• structured finance
• subordinated debt
• subrogation
• subscribed share capital
• subscriber
• subscription shares
• subsidiary undertaking
• subsidy
• sum
• sum insured
• summary financial statement
• sunk capital
• superannuation
• supermajority provisions
• superregional bank
• supervisory board
• supplementary special deposit scheme
• supply and demand
• supply estimate
• supply risk
• support level
• supra protest
• surety