This field provides the actual calendar date for contract maturity - month and year (used for standardized futures and options). Format YYYYMM (i.e. 200912) For futures strategies and options spreads, this field contains the first leg maturity. For packs and bundles, this value represents the rollover date. For daily products, this field contains the daily maturity (YYYYMMDD).

public const int MaturityMonthYear = 200