Gold and Silver (XAU/USD and XAG/USD) trading will stop at 17:00 GMT on Monday, September 2nd 2013 due to US market being closed. Metals trading will resume normally at the start of Asia session at 22:00 GMT.
Note the liquidity may be lower than usual for all instruments during the US trading hours on September 2nd.
Source: دوكاسكوبي بنك السويسري
