By Asma Alsharif
Saudi benchmark TASI was up 0.32% at 6,142 points and the petrochem index was up 0.84%.
Saudi shares closed higher in the year's first session of 2010, led by gains in the petrochemical sector.
The Saudi benchmark TASI was up 0.32 percent at 6,142 points and the petrochemical index was up 0.84 percent to 5,442 points.
Shares in petrochemical heavyweight, Saudi Basic Industries (SABIC)rose by 0.3 percent to 82.75 riyals while shares in Petro Rabigh gained 0.56 percent to 35.70 riyals.
Saudi Kayan gained 1.37 percent to 18.45 riyals.
The Saudi bourse's capitalisation gained 29.3 percent in 2009 after losing more than half its value the previous year.
Shares in dairy firm Almarai closed 0.61 percent lower after it split the ownership in Egyptian dairy and juice company Beyti with a PepsiCo Inc. (Reuters)