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Some share prices have been delayed when the data feed from NYSE-Run reached a glitch



A major stock market feed from the New York Stock Exchange suffered a technical flaw on Monday that led to delays in the release of the Dow Jones Industrial Average and S & P 500 end-of-day stocks.

The problem that was fixed late in the evening was the latest in a series of technical issues for the NYSE in recent years. The NYSE is in the process of improving the core technology of its flagship exchange.

The data feed affected by Monday's glitch is one of two securities information processors (SIPs) that aggregate stock price information and trades and broadcast it to a number of brokers and financial media.

The affected SIP by the glitch distributes data on NYSE listed stocks as well as some other securities. A SIP of

Nasdaq
Inc.


NDAQ -1.99%

was not affected.

The Consolidated Tape Association, the group monitoring the data feed for stocks listed on the NYSE, first reported a pm New York time issue at 3:15 pm, and later stated, according to alerts, on the CTA website a backup data center has been converted.

However, according to another warning message, at 19:28, "connectivity and trade input problems" still occurred on the CTA. The group – a consortium of US stock exchanges and Wall Street's self-regulatory body, the Financial Industry Regulatory Authority – commits the operation of the data feed to a unit of the NYSE. At 21.17 clock According to CTA, the problem has been resolved.

"Due to the earlier reported CTA issue, there are delays in publishing trades and closing prices for a subset of symbols on the consolidated tape," its NYSE news release said.

Monday's trading was generally smooth despite the glitch. Some financial data providers, such as However, the values ​​of the Dow and the S & P 500 have been revised belatedly. Yahoo Finance and Google have reported closing dates for the S & P 500 that have been timestamped at 17:13, approximately one hour later than usual

Day end prices, which are normally published shortly after 4:00 pm, have been published in In recent years, investors have been stacking money in index funds. Such funds are used to passively track a basket of underlying stocks, and fund managers strive every day to keep the funds in line with the close of each stock.

Several off-market "dark pools" – private platforms for trading stocks – went offline during the SIP crash, traders said. Such platforms rely on stock market information to determine the prices at which trades are executed.

A NYSE spokesman declined commenting on official announcements posted on the website. A CTA spokesman sent comments to the NYSE, a unit of Intercontinental Exchange Inc. based in Atlanta.

Reporting failed to determine immediately whether the Monday mishap is due to the NYSE flagship exchange upgrade. The Big Board is replacing old technology with a new, faster platform called Pillar.

The upgrade launched last week focuses on the NYSE trading systems that bring buyers and sellers together, rather than on the systems that are responsible for the broadcast price.

Write to Alexander Osipovich at [email protected]

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