More detail on what exactly caused NYSE's trading glitch on Tuesday

NYSE President Lynn Martin and different exchange officials confirmed to CNBC that the basal origin of the Big Board's trading glitch astatine the Tuesday unfastened was owed to a manual mistake involving the Exchange's Disaster Recovery configuration. 

After the 9/11 disaster, the NYSE was obligated to support a superior trading tract (at the NYSE) and a back-up tract (which is successful Chicago). 

On Monday evening, regular attraction was being performed connected the bundle for the Chicago back-up site. 

On Tuesday morning, the back-up strategy (Chicago) was mistakenly inactive moving erstwhile the superior strategy (NYSE) came online. 

Because the back-up was inactive running, erstwhile the superior tract started up immoderate stocks behaved arsenic if trading had already started.  

As a result, Designated Market Makers (DMMs) who would usually people an opening auction people for each banal were prevented from doing truthful due to the fact that the strategy operated arsenic if an opening had already occurred.  This caused important terms dislocations and trading halts. 

Martin said the NYSE was looking into implementing stronger investigating protocols.