The Saudi index jumped 3.2 percent in the opening 20 minutes of trade to 6,071 points. Its 3.2 percent rise on Thursday triggered a minor double bottom formed by the lows since mid-January and pointing up to around 6,300 points.
Beaten-down petrochemical producer Saudi Kayan was the most heavily traded stock, gaining 6.2 percent. But construction firm Jabal Omar fell 0.4 percent after reporting a loss for the fourth quarter.
Egypt's stock index climbed 1.7 percent on the back of a few stocks such as Elsewedy Electric, up 5.8 percent; most of the 10 most heavily traded stocks were flat.