Saudi stocks plunged to their weakest in more than two weeks on Sunday, hit by the latest drop in oil prices, pushing most Gulf markets down.
The Saudi index lost 0.4% to close at 7,711 points, its lowest level since October 24, amid the decline of most of the shares traded.
The Saudi index fell on Sunday for the third session in a row affected by the negative performance of its main sectors.
The losses included 121 stocks, compared with 56 shares closed in green.
Abu Dhabi's shares also fell 0.5% as Abu Dhabi National Energy Co fell 3.6% as weak oil prices overshadowed strong third-quarter earnings announced last week.
Oil prices fell about 1 percent on Friday as global supply grew and investors worried about slower demand growth in international markets, pushing US crude to its longest daily loss since 1984.
The weakness of real estate stocks negatively affected the Dubai index, which closed down 0.3%.
In Egypt, financial stocks led the index, which fell 1.2% to settle at 13,571 points.
Qatar's benchmark, the Gulf's best performer this year, recovered from early weakness to close up 0.2 percent, boosted by gains in real estate and some banks.
The Muscat Securities Market Index (MSM) rose 0.3%, while Bahrain and Kuwait bourses remained unchanged.
"There has been a decline in the performance of most of the regional markets, which is normal, under pressure to take profits, as well as near the end of the disclosure season," said Mohamed Al-Jundi, director of technical research at Saudi Arabia's asset management profit.
"We expect the regional markets to perform well, drawing support and strength from the results of companies and banks, especially the Gulf, which has made good profits in its entirety," he said in an interview with Anatolia.