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SEC fines NYSE $9 million for glitch disrupting stock market

New York Stock Exchange agreed to pay $9 million to settle U.S. Securities & 'Exchange Commission charges?over a computer glitch that disrupted the opening of the stock exchange in January 2023 and caused wild swings in prices for blue-chip stocks.

The settlement reached on Friday stems from an incident that occurred in 2023 when the NYSE accidentally ran its primary and backup trading system Pillar Production, and Pillar DR (short for disaster recovery) at the same time.

The SEC stated that the error caused the primary system to treat opening auctions of 2,824 of NYSE's 3,421?"listed securities" at the time, as if they had already occurred.

The glitch led to the halting of trading for 84 stocks. This included 81 stocks whose prices dropped more than 10% with no apparent explanation. More than 4,000 trades were undone or "busted". ExxonMobil was affected, as were McDonald's, 3M and Verizon.

According to SEC, it took the NYSE 39 minutes to realize that the 'opening auctions' were a mess and 83 to understand the'scope of damage.

The lack of policies and procedures in place to support the "auctions" was allegedly the cause. The NYSE compensated member companies for trading losses in excess of $5.77million.

Intercontinental Exchange, based in Atlanta, said that it has improved its procedures and systems. It also stated that the "NYSE opening -and-closing auctions remain to be most reliable liquidity events for NYSE listed symbols." (Reporting from Jonathan Stempel, New York; editing by Hugh Lawson.)

(source: Reuters)