Double butterfly, as defined below
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Double Butterfly
⦠combines four Quarterly GE contracts with equally distributed delivery months. Itâs useful to imagine a
double butterfly as a calendar spread between two conventional butterflies, in which the second and third
legs of the nearer butterfly also serve duty as the first and second legs, respectively, of the more distant
butterfly. Accordingly, the double butterfly spread ratio is always +1:-3:+3:-1. That is, buying 1 double
butterfly entails:
(a) buying 1 of the nearest delivery month (Leg1),
(b) selling 3 of the second nearest delivery month (Leg2),
(c) buying 3 of the third nearest delivery month (Leg3), and
(d) selling 1 of the farthest delivery month (Leg4).
CME Globex customarily permits trading in three variants: three-month (eg, Jun13-Sep13-Dec13-Mar14),
six-month (eg, Jun13-Dec13-Jun14-Dec14), and one-year (eg, Jun13-Jun14-Jun15-Jun16). Price is
always quoted as (Leg 1 price) minus (3 x Leg 2 price) plus (3 x Leg 3 price) minus (Leg 4 price).
Minimum price moveme"
I don't get why you would do this.. what would this expression be trying to accomplish? like why would you do this?
"
Double Butterfly
⦠combines four Quarterly GE contracts with equally distributed delivery months. Itâs useful to imagine a
double butterfly as a calendar spread between two conventional butterflies, in which the second and third
legs of the nearer butterfly also serve duty as the first and second legs, respectively, of the more distant
butterfly. Accordingly, the double butterfly spread ratio is always +1:-3:+3:-1. That is, buying 1 double
butterfly entails:
(a) buying 1 of the nearest delivery month (Leg1),
(b) selling 3 of the second nearest delivery month (Leg2),
(c) buying 3 of the third nearest delivery month (Leg3), and
(d) selling 1 of the farthest delivery month (Leg4).
CME Globex customarily permits trading in three variants: three-month (eg, Jun13-Sep13-Dec13-Mar14),
six-month (eg, Jun13-Dec13-Jun14-Dec14), and one-year (eg, Jun13-Jun14-Jun15-Jun16). Price is
always quoted as (Leg 1 price) minus (3 x Leg 2 price) plus (3 x Leg 3 price) minus (Leg 4 price).
Minimum price moveme"
I don't get why you would do this.. what would this expression be trying to accomplish? like why would you do this?
On a fundamental basis, to trade small (perceived) distortions on a segment of the curve. Or in the days when the Fed were on the move, perhaps used to express a view on the pace and extent of a tightening/cutting cycle.