Saudi stock exchange, Tadawul, was out of service for two hours following a 'technical problem' as authorities report. The cause and scale of the problem was not reported. It is an irregular incident raising issues about its origin. The authorities had announced the problem was solved and trading resumes. 

Saudi stock market is valued at $2.6 billion, which puts it at the top stock exchange in the Arab world. Over 200 companies participate in the Saudi stock market, the most prominent one is "Aramco". The technical problem did not disrupt the market, as it  showed an increase of 0.56%.