RIYADH: The Saudi stock exchange has approved the listing of SR1.7 billion ($452 million) worth of government debt instruments submitted by the Ministry of Finance. The amount will be used to increase the size of three existing issuances to reach SR4.49 billion, SR30.4 billion, and SR15.1 billion, respectively. The listing and trading of the instrument"s reissue will start on Sept. 15, Tadawul said in a statement.