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On 05/05/05 16:47 Joe S wrote:
 
Would someone please tell me what the convention is for calculating 
the day to roll over to the next contract month in 30 year T-Bonds, 
Interactive Broker's symbol ZB?  Specifically, I want to know when to 
roll from the current June'05 contract to the September contract.  
Thank you very much. 
 
 
Hey Joe 
 
I would roll over when the next month's volume overtakes the expiring 
month's volume. Or 3 days prior to expiry. 
 
 
Adam 
 
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