The opening levels across a number of European stock indices failed to appear to traders this morning after the Euronext exchange suffered a "technical incident".
The glitch meant that France's benchmark index, the CAC 40, had no opening levels published – nor did the Netherlands' AEX, Belgium's BEL 20 and Portugal's PSI 20.
Euronext, which spun off from New York's Intercontinental Exchange when it listed independently in 2014, said in an update to traders that it was "currently addressing the root cause of this incident".
It added that trading in cash and derivatives instruments would take place as normal, but that the glitch was also causing "issues" with calculating price limits for its derivative markets.
"Members are advised that price limits for all markets have been widened or disabled in order to allow order entry and trade execution," the exchange told traders.
The fault comes exactly one month after Germany's Deutsche Boerse was afflicted with "serious issues" surrounding equities and futures trading which delayed the opening of markets.
A spokesperson for Euronext told City A.M. that the issues had not been caused by a cyber attack.
Euronext later added that all issues were resolved by 9.37am CET.