Our approach to the compilation of the Ascend Index® is as follows:

Type-Based Groups

Each type-based Group is prepresented by one 'generic' aircraft from up to five leading types which were being built and operated in the category year. e.g. The 1980 Narrowbody portfolio index consists of one 737-200Advanced, one DC-9, one BAe 1-11, one MD-80 and one 727-200Advanced, all of which were the most populous types built in 1980. The index for this portfolio is therefore derived from the combined 'market' values of the aircraft that make up the category, in generic value terms. This portfolio is then monitored annually over time, such that by the year 2000 it reflects the current value of the basket of generic aircraft.

Operator-Based Groups

Each operator area-based Group will consists of one generic sample aircraft from each of the five main types which were built and delivered in the category year to operators in the given geographic area. e.g. The 1990ASIA portfolio index will be based on the values for one generic example of the five most populous types of aircraft built in 1990 and delivered to Asian operators. The index for this portfolio is therefore derived from the average market value of the combined group of aircraft that make up the category, in generic value terms. This portfolio is then monitored annually over time, as per the type based groups.

The individual aircraft types in the groups that make up the Ascend Index® are as follows:

TYPE-BASED GROUPS
1980 NB	1980 WB			1980 WBF
Boeing 727-200Advanced	Airbus A300B4-200			MDC DC-10-30F/CF
Boeing 737-200Advanced	MDC DC-10-30			Boeing 747-200F
MDC DC-9-30	Boeing 747-200B
Fokker F.28-4000	Lockheed L.1011-500
MDC MD-81	Lockheed L.1011-200
1985 NB	1985 WB	1985 TP
BAe 146-200	A310-200	Fairchild Metro III
MDC MD-82	Boeing 747-300	BAe Jetstream 31
Boeing 737-300	Boeing 767-200	Beech 1900C
Boeing 737-200Advanced	Boeing 767-200ER	Saab 340A
Boeing 757-200	Boeing 747-200M Combi	Shorts 360
1990 NB	1990 WB	1990 TP		1990 NBF
Boeing 757-200	Airbus A300-600R	Dash 8-100		BAe 146-300QT
MDC MD-82	Boeing 747-400	Embraer Brasilia		Boeing 757-200PF
MDC MD-83	Boeing 767-300ER	BAe Jetstream Super 31
Boeing 737-300	Boeing 767-200ER	Beech 1900C-1
Boeing 737-400	Airbus A310-300	Saab 340B
1995 NB	1995 WB	1995 TP	1995 RJ	1995 WBF
Airbus A320-200	Airbus A330-300	ATR72-200	Canadair CRJ-100	Boeing 767-300ERF
Airbus A321-100	Airbus A340-300	FD 328-100	Embraer ERJ-145	Boeing 747-400F
Boeing 737-300	Boeing 747-400	BAe Jetstream 41	Fokker 100	MD-11F
Boeing 737-500	Boeing 767-300ER	Beech 1900D	Fokker 70	Airbus A300-600F
Boeing 757-200	Boeing 777-200	Saab 2000	Avro RJ85
2000 NB	2000 WB	2000 TP	2000 RJ
Airbus A319-100	Airbus A330-200	ATR42-500	Boeing 717-100
Airbus A320-200	Airbus A340-300	ATR72-500	Canadair CRJ-200
Boeing 737-700	Boeing 747-400	Dash 8-300	Fairchild Dornier 328Jet
Boeing 737-800	Boeing 777-200ER	Dash 8-400	Embraer ERJ-145
Boeing 757-200	Boeing 767-300ER	Beech 1900D	Embraer ERJ-135
OPERATOR-BASED GROUPS
1985 ASIA	1985 EU
Boeing 737-300	Airbus A310-200
Boeing 737-200Advanced	MDC MD-82
Boeing 747-300	Boeing 737-200Advanced
Boeing 767-200	Boeing 737-300
Airbus A300-600	Boeing 757-200
1990 ASIA	1990 EU	1990 US
Airbus A300-600R	Airbus A320-200	MDC MD-82
Boeing 737-300	Boeing 737-400	Boeing 737-300
Boeing 737-400	Boeing 737-500	Boeing 737-400
Boeing 747-400	MDC MD-87	Boeing 757-200
Boeing 767-300ER	MDC MD-83	MDC MD-83/88
1995 ASIA	1995 EU	1995 US
Airbus A320-200	Airbus A321-100	MDC MD-90
Airbus A330-300	Avro RJ85	Boeing 737-300
Airbus A340-300	Boeing 737-300	Boeing 737-500
Boeing 737-300	Candair CRJ-100	Boeing 757-200
Boeing 747-400	Fokker 70	Canadair CRJ-100
2000 ASIA	2000 EU	2000 US
Airbus A320-200	Airbus A319-100	Airbus A319-100
Airbus A330-200	Airbus A320-200	Boeing 737-700
Boeing 737-800	Airbus A321-200	Boeing 737-800
Boeing 777-200ER	Boeing 737-800	Canadair CRJ-200
FD 328Jet	Embraer ERJ-145	Embraer ERJ-145