NYSE Tuesday opening mayhem traced to a staffer who left a backup system running
&gt; That misled the exchange’s computers to treat the 9:30 a.m. opening bell as a continuation of trading, and so they skipped the day’s opening auctions that neatly set initial prices.<p>I didn&#x27;t even know about this process. I don&#x27;t know much about trading, but it surprises me that there is a separate process for setting prices at the start of trading, and that if it&#x27;s missed, chaotic prices result.<p>Is this related to how stock markets aren&#x27;t really ever open 24 hours? Do they need that reset to function in stable way?