The average yields on Egypt's six-month and one-year treasury bills rose at an auction on Thurs.
The circular said that the decision was taken at a meeting on Saturday, ditching the 250 riyal rate to the U.S. dollar currently in use.
An extraordinary general meeting of Bank Sohar shareholders approved a proposal to issue additional tier 1 capital by way of perpetual bonds.
The $200 million of private sukuk, due in May 2022, were priced at a 4.991 percent.
Yemen's central bank has complained to its allies in a Saudi-led military coalition about a lack of cash deliveries needed to pay salaries.
The average yields on Egypt's three- and nine-month treasury bills were mixed at an auction on Sun.
Jordan has asked banks to submit proposals to arrange a U.S. dollar conventional or Islamic bond issue.
The U.S. consumer price index edged up 0.1% last month after being unchanged in June.
U.S. consumer prices rose slightly in July as higher food costs were partly offset by falling prices for a range of other goods, suggesting benign inflation that could persuade a cautious Federal Reserve to delay raising interest rates until December.
Asian equity markets extended a global slide on Friday as tensions ramped up between the United States and North Korea, sending investors fleeing to less risky assets such the yen and the Swiss franc.