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An email shows that the NYSE Group Stock Exchange and other UTP exchanges jointly decided to cancel all erroneous transactions related to CTA SIP quotation problems between 9:50 and 9:51 a.m. Eastern Time (9:50 and 9:51 p.m. Beijing Time) of Berkshire Hathaway (BRK.A.N) owned by Buffett, with a price lower than or equal to $603,718.30 per share. Previously, Berkshire Hathaway fell from $620,000 per share to $185.1 per share, a 99.97% plunge, and about 50 shares were traded here.
In addition to Berkshire Hathaway, about 40 stocks were suspended due to software update failures, including Barrick Gold and NuScale Power. About 45 minutes later, the Consolidated Tape Association, operated by a subsidiary of the New York Stock Exchange, restored the system to a backup data center running a different software version, resolving the outage, the third in the past week for U.S. markets.
The sudden outage did not affect Nasdaq-listed stocks and had minimal impact on the broader market, but it came as the market was adapting to the T+1 settlement mechanism. A glitch last Thursday left the S&P 500 without real-time quotes for more than an hour.
"It's a little strange, but almost certainly coincidental, that this is happening after last week's S&P 500 outage," said Steve Sosnick, chief strategist at Interactive Brokers, referring to the NYSE problems following last week's S&P 500 outage. "We're used to a lot of uptime without exchange incidents, so when you have a few in a row, it's noticeable."
"I think the bad trades are going to get broken," said Jonathan Corpina, senior managing partner at Meridian Equity Partners. "I'm more curious about how did this happen? I know what happened, but I want to know how did it happen?"
Stock trading in the U.S. is executed by more than a dozen exchanges, and all buy and sell orders are integrated through data feeds distributed around the world. The New York Stock Exchange is owned and operated by Intercontinental Exchange Inc., which owns several exchanges, including NYSE Arca and NYSE American.
The disruptions are reminiscent of a chaotic episode in January 2023 when a worker at the New York Stock Exchange's backup data center in Chicago made an error running a backup system, causing wild price swings in hundreds of stocks when the market opened.
"Whether it's a coincidence or not, this is certainly the second trading day in the past three that has caused a bunch of chaos," Dave Lutz, head of ETFs at JonesTrading, said in a message.
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