For Fixed Income. Identifies the benchmark (e.g. used in conjunction with the SpreadToBenchmark field). Valid values: 1 = CURVE 2 = 5-YR 3 = OLD-5 4 = 10-YR 5 = OLD-10 6 = 30-YR 7 = OLD-30 8 = 3-MO-LIBOR 9 = 6-MO-LIBOR