Trans-Atlantic exchange operator NYSE Euronext (NYX) promised Tuesday to address technical problems that disrupted trading in its European markets for the second straight day.

NYSE Euronext said that trading in the AEX and Bel-20 benchmark indices was halted at 0707 GMT due to "some latencies in its cash market." The exchange operator said it is addressing the root cause of the issue, but didn't say when the exchanges will resume trading.

In Paris trading in some stocks and bonds was suspended but is expected to be back to normal at 0900 GMT, Caroline Tourrier, a Paris-based NYSE Euronext spokeswoman, said.

Trading of derivative products was unaffected by the technical glitch, Tourrier said.

On Monday morning, NYSE Euronext suspended all trading between 0700 GMT and 0800 GMT because of a "technical problem." Tourrier declined to say whether the two problem are related.

Monday's glitch was a problem with the start-up procedure for European stock and bond markets, leading to a one-hour delay in opening trade, which also affected markets in Lisbon.

A "technical issue" at the launch of the software powering NYSE Euronext's platforms for trading equities, bonds and exchange-traded funds left exchange members unable to enter, change or cancel orders, employees of the exchange operator told customers in a notice.

The Big Board parent's level of European share trading on Monday was just over 15%, running below its past-week average of 16.4%, according to data from BATS Global Markets. BATS' European platform, alongside the markets run by Chi-X Europe, both saw increases in their market share.

-By Maarten van Tartwijk, Dow Jones Newswires; +31 20 571 5201; maarten.vantartwijk@dowjones.com

(Jacob Bunge and Inti Landauro contributed to this article.)

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