Trading on the New York Stock Exchange is back to normal after the exchange experienced two technical glitches earlier today.

According to a press release from NYSE, the technical issue in one of the bourse’s trading units, which affected a subset of symbols listed on its Market Status website has been resolved. All open orders, including MOC and LOC orders, were originally cancelled.

“Trading has resumed in those symbols at 1:17 pm ET and all systems are now operating normally,” NYSE said in a statement. Furthermore, to participate in the closing auction, MOC and LOC orders in the impacted symbols will need to be re-submitted.

The glitch, according to a NYSE spokeswoman, the initial glitch occurred around 9:45 am, 15 minutes after the market open, and halted trading in 199 select stocks. Trading in the affected symbols did continue on the NYSE Arca venue.

“The glitch affected less than 4% of all securities traded on NYSE,” a spokeswoman told Markets Media.

As a result of the technical issue, CNBC reported both the Nasdaq and Bats stock exchanges had declared self-help against the NYSE amid multiple technical issues that closed all open orders on the stocks.

Self-help occurs when an exchange experiences an issue where it cannot process trades on its own – necessitating these orders be send to other public exchanges.

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Featured image by Abhisit Vejjajiva/Flickr