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Originally posted by Vinny1
Are MM's liable for their quotes in after hours,and for that matter,in pre market?


No. There is no trading pre & post market through MM's. You can only trade through ECN's pre & post market. The MM's can post whatever they want.
 
Originally posted by macal425



No. There is no trading pre & post market through MM's. You can only trade through ECN's pre & post market. The MM's can post whatever they want.

Thanks. Would you also happen to know if ARCA is proactive(trades with all the other ECN's) in pre and post market,just like normal market hours?
 
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