The Instrument submodel contains data structures that represent financial instruments.
The Instrument table stores that information that is common to all these instruments, includingthe name, trading symbol, issue date, issuer rating, trading currency, and exchange.
Corresponding tables store details about each type of instrument; for example, stock-related information is stored in the Stock (STOCK) table; information related to bonds is stored in the Bond (BOND) table, and so on.