The London Stock Exchange experienced a problem when members inputted invalid data on its platform this morning, which left its participants unable to trade certain UK stocks for over an hour.
At 10.08, the exchange posted a note on its incident communications website stating that 16 London instruments were unavailable for trading. The list included six FTSE 100 stocks: Aviva, Cable and Wireless, Diagio, Alliance Trust, Lonmin and Randgold.
The issue was resolved at 11.30, when all the affected stocks entered a three-minute opening auction. The LSE has reported that all instruments have now uncrossed and resumed continuous trading.
“Customers were asked not to input orders while we cleared the backlog of data,” said a spokesperson for the LSE. “The incident was not technology based and was solved in a controlled manner.”
The glitch also affected some of the order types offered by multilateral trading facilities. BATS Europe, for example, was unable to offer pegged orders, 20% collar orders or dark trading in the affected stocks.