hip ▁agreement . ▁The ▁Johannes burg ▁Stock ▁Exchange ▁also ▁adopted ▁Trad E lect . ▁ ▁Dow nt ime ▁On ▁ 8 ▁September ▁ 2 0 0 8 , ▁Trad E lect ▁trad ing ▁was ▁mostly ▁un available ▁for ▁over ▁ 7 ▁hours , ▁on ▁what ▁the ▁Wall ▁Street ▁Journal ▁described ▁as ▁a ▁" h uge ▁trad ing ▁day ". ▁Trad ers ▁walked ▁out ▁of ▁the ▁London ▁Stock ▁Exchange ▁in ▁protest . ▁Another ▁major ▁technical ▁fault ▁had ▁occurred ▁less ▁than ▁a ▁year ▁earlier . ▁ ▁The ▁London ▁Stock ▁Exchange ▁claimed ▁that ▁the ▁Trad E lect ▁software ▁was ▁not ▁to ▁bl ame , ▁instead ▁bl aming ▁an ▁un spec ified ▁fault ▁with ▁" network ▁software ". ▁However , ▁Cel ent ▁anal yst ▁Cub illas ▁D ing ▁noted ▁that ▁this ▁out age , ▁and ▁three ▁previous ▁ones , ▁all ▁coinc ided ▁with ▁large ▁sp ikes ▁in ▁trad ing ▁volumes , ▁from ▁different ▁economic ▁events , ▁and ▁concluded ▁that ▁the ▁L SE ' s ▁technology ▁could ▁not ▁co pe ▁with ▁the ▁high ▁trad ing ▁volumes . ▁ ▁Microsoft ▁had ▁previously ▁used ▁Trad E lect ▁as ▁a ▁case ▁study ▁in ▁market ing ▁material ▁to ▁position ▁its ▁Windows ▁operating ▁system ▁as ▁suitable ▁for ▁" high ly ▁reliable " ▁systems . ▁It ▁did ▁not ▁respond ▁to ▁requests ▁for ▁comment . ▁ ▁Success or ▁ ▁In ▁May ▁ 2 0 0 9 , ▁the ▁London ▁Stock ▁Exchange ▁gained ▁a ▁new ▁CE O , ▁X avier ▁Ro let , ▁who ▁set ▁about ▁review ing ▁costs ▁and ▁cutting ▁jobs . ▁Only ▁two ▁years