Four Chinese companies raised about $1.5 billion in July by issuing shares on the Six Swiss Exchange via a new China stock connect program.
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Switzerland’s stock exchange SIX said trading had been halted on Wednesday morning across all products until further notice due to issues with disseminating data.
SIX said market data for the Spanish stock exchange, which it also operates, was also not being disseminated, although trading was not halted.
The exchange said the Swiss trading halt, which began at 1000 CET (0800 GMT) affected bonds, derivatives, exchange-traded products, equities and funds, and said further information will follow.
“Market data and index data is not being disseminated at the moment and we are investigating the cause and trying to solve,” a spokesperson at SIX told Reuters.
“Trading was not affected, but we had to halt trading in Switzerland due to equal treatment of market participants.”
A spokesperson for the Spanish stock exchange said: “The market is operating normally… we are analysing some incidents in the dissemination of data. But the market is operating normally.”
The Swiss stock exchange is home to companies including Nestle, Roche and UBS. Multiple trades including in bonds, ETFs, and structured products were declared “mistrades” and cancelled in Switzerland, SIX said on its website.
Prices for Spain’s IBEX index were being updated on LSEG workspace at 0850 GMT.