Oil prices - a catalyst for the Gulf's financial markets - fell on Friday as traders looked toward weaker demand in the U.S., the world's largest oil market, and a boost in supply this autumn from OPEC and its allies.
Brent crude futures for October delivery , which expired on Friday, settled at $68.12 a barrel, down 50 cents, or 0.73%.
Lower prices and disruptions to crude exports impact fiscal balances in countries reliant on oil income.
Saudi Arabia's benchmark index (.TASI), opens new tab eased 0.3%, hit by a 5.4% fall in SABIC Agri-Nutrients Co (2020.SE), opens new tab.
The Saudi central bank's net foreign assets fell by $13.3 billion in July from the previous month, central bank data showed on Thursday.
In Qatar, the index (.QSI), opens new tab finished flat.
Outside the Gulf, Egypt's blue-chip index (.EGX30), opens new tab declined 1.6%, as almost all its constituents were in negative territory including tobacco monopoly Eastern Company (EAST.CA), opens new tab, which was down 1.8%.
