▁encou rage ▁efforts ▁to ▁strength en ▁the ▁mark ets . ▁In ▁the ▁weeks ▁following ▁the ▁free ze , ▁the ▁SE C ▁called ▁for ▁both ▁Nas da q ▁O M X ▁and ▁NY SE ▁Eur one xt ▁to ▁develop ▁tim elines ▁of ▁the ▁free ze ▁in ▁order ▁to ▁identify ▁the ▁causes ▁and ▁areas ▁for ▁improvement . ▁It ▁was ▁reported ▁that ▁the ▁two ▁platforms ▁had ▁conflic ting ▁reports ▁of ▁the ▁causes ▁and ▁events . ▁ ▁Nas da q ▁were ▁also ▁critic ised ▁for ▁their ▁lack ▁of ▁communication ▁with ▁trad ers ▁and ▁ret ail ▁invest ors ▁while ▁the ▁market ▁was ▁closed . ▁Sign ific antly , ▁no ▁message ▁was ▁sent ▁by ▁Nas da q ▁through ▁the ▁market ▁feed ▁to ▁inform ▁trad ers ▁that ▁the ▁free ze ▁had ▁occurred . ▁These ▁messages ▁are ▁re lied ▁upon ▁by ▁automatic ▁trad ing ▁systems ▁to ▁ensure ▁tr ades ▁are ▁not ▁placed ▁on ▁mark ets ▁which ▁aren ' t ▁operating , ▁and ▁resulted ▁in ▁manual ▁shut ▁down ▁of ▁tr ades ▁in ▁some ▁fir ms . ▁ ▁Land Col t ▁Capital ▁Man aging ▁Director ▁Tod d ▁Sch o en berger ▁was ▁quoted ▁as ▁saying ▁" The ▁lack ▁of ▁trans par ency — we ▁haven ' t ▁heard ▁from ▁the ▁Nas da q , ▁we ▁haven ' t ▁heard ▁from ▁Washington — it ▁creates ▁cha os ▁and ▁uncertainty .” ▁Har vey ▁Pitt , ▁a ▁former ▁chair ▁of ▁the ▁SE C ▁was ▁quoted ▁as ▁saying ▁" It ▁looked ▁like ▁Nas da q ▁was ▁cl uel ess ▁about ▁how ▁to ▁deal ▁with ▁this ▁emer gency