The margins for gold contracts Au(T+D), mAu(T+D), Au(T+N1), Au(T+N2), NYAuTN06 and NYAuTN12 will be raised to 9% from 8%, the SGE said in a notice on its website.

The exchange will also change trading limits for gold contracts to 8% from 7% starting July 24 and warned members to invest rationally and "reasonably" control the scale of positions, it said.

(Reporting by Min Zhang and Tom Daly; Editing by Toby Chopra)