Riyadh: Saudi Arabian stocks rose for a second day as oil advanced to a three-week high on reports signalling the US economic recovery is gathering strength.

Saudi Basic Industries Corp, the world's biggest chemical maker by market value, gained the most since November 4. Saudi Kayan Petrochemical Co. climbed to its highest in almost two months.

The Tadawul All Share Index rose for a second day, advancing 0.4 per cent to 6,271.54 in Riyadh. The measure advanced to a three-week high, bringing this year's rally to 31 per cent. Saudi Basic, known as Sabic, climbed 1.8 per cent to 84.25 riyals. The stock surged 63 per cent this year.