Dec. 的期货 will be expired in Nov.

有些大小户就会 rollover to next expire contract.

所以往往动荡比较大。

for example :

NYBOT

KC

201712

COFFEE C

2 business days prior to cutoff

2017/11/21 13:30 (ET)

ECBOT

ZW

201712

WHEAT FUTURES

1 business day prior to cutoff

2017/11/29 13:15 (CT)

所有跟帖： 

• 谢谢提醒！IB真是坑爹，KCZ7 showes Dec18 expire -不是总统- ♂ (36 bytes) () 11/14/2017 postreply 08:43:54