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Example 1 - UDS Constructed with Outright Options
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Client defines a new options spread consisting of the following legs/repeating groups:
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GE0Z7 C8900 (side = Buy, ratio =1)
GE0Z7 C8950 (side = Sell, ratio = 2)
GE0Z7 C9000 (side = Buy, ratio = 1)
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CME Globex determines that these legs have the lowest terms of 1:2:1 and accepts the message.
Example 2 – UDS Constructed with Exchange Recognized Options Spread Type Instruments
Client defines a new options spread consisting of the following legs/repeating groups:
UDS1: UD:U$: VT 1025924242 (side = Sell, ratio = 1)
Leg 1: B GEU8 P9825
Leg 2: S GEU8 P9787
UDS2: UD:U$: VT1025924175 (side = Sell, ratio = 1)
Leg 1: B GEU8 P9837
Leg 2: S GEU8 P9787
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CME Globex identifies the component instruments as:
Buy 1 GEU8 P9825, Sell 2 GEU8 P9787, Buy 1 GEU8 P9837
Ratio = 1:2:1, Spread Type = GN
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CME Globex determines that these legs have the lowest terms of 1:2:1, accepts the message, and creates the instrument: UD:U$: GN 1025924309
Example 3 - UDS Constructed with Invalid Leg Ratio - Security Definition Rejected
This example shows how a proposed UDS will be rejected due to leg ratio lowest common denominator validation.
Client defines a new options spread consisting of the following legs/repeating groups:
GE0Z7 C8900 (side = Buy; ratio 2)
GE0Z7 C8950 (side = Sell; ratio 3)
GE0Z7 C9000 (side = Buy; ratio 1)
UD:U$: VT 1025924242 (side = Sell, ratio = 1)
CME Globex identifies the component instruments as follows:
GE0Z7 C8900 (side = Buy; ratio 2)
GE0Z7 C8950 (side = Sell; ratio 3)
GE0Z7 C8950 (side = Sell; ratio 1)
GE0Z7 C9000 (side = Buy; ratio 1)
GE0Z7 C9000 (side = Buy; ratio 1)
CME Globex combines legs 2 and 3 and legs 4 and 5 as identical:
GE0Z7 C8900 (side = Buy; ratio 2)
GE0Z7 C8950 (side = Sell; ratio 4)
GE0Z7 C9000 (side = Buy; ratio 2)
CME Globex determines that these legs have lowest terms of 1:2:1 and rejects the message.
In the case of the rejected iLink Security Definition Request above, the request is rejected due to the quantity of each leg requested. The client can submit the same legs in their lowest terms format then, when the instrument is created (UD:U$: GN 1209250005), place an order or quote for 2.