The start_date represents the contractual date of commencement of the financial product. This may corresponds to: - the effective date for swap and option contracts, - the issue date of a security - the start date of a SFT - any other specific attribute which denotes the date at which a financial contract takes effect It is in date-time format in accordance with the ISO 8601 standard (YYYY-MM-DDTHH:MM:SSZ).

See also date and issue_date