Stock Exchange, NYSE Euronext To Release Incorrect Stocks Information

A technical problem caused NYSE Euronext Stock Exchange to release over 1,000 of incorrect stocks information and securities on Thursday. The error resulted in some online sites showing closing prices for some securities that were actually based on trades that had occurred in electronic trading after markets had closed. The problem started at 7:27 p.m. Thursday when NYSE’s Arca platform sent incorrectly coded share price information. An email sent to traders Friday said the problem involved prices from aftermarket trades Thursday that were incorrectly coded as if they had happened during regular trading that day. The email says the mix-up affected the closing price in some shares that trade on the New York Stock Exchange as well as its Arca platform. The mix-up confused some investors. The share price for Precision Castparts Corp. showed a decline of as much as 9.6 percent Friday, but that was based on an incorrect comparison to the after-hours price. In reality, its shares were down less than 3 percent from Thursday’s close. The error affected some stocks, exchange-traded funds and mutual funds that started with the letters A though T. Symbols starting with U through Z were not affected. More than 1,000 ticker symbols were effected at Stock Exchange, NYSE. The mix-up is still being investigated. Click To See More Stock Trading Info