Investors have reacted positively to the establishment of a supervisory board under the 2003 Capital Markets Law, seen as a major step towards long-awaited reforms. Sahara, which started trading Wednesday, surged 230 percent from its offer price to close the week at SR165. The company was recently established by Al-Zamil, one of the Kingdom's largest private trading groups, to set up an olefins complex and a polypropylene plant. Meanwhile, blue-chip Saudi Electricity Company, which dominated trading with 21.5 percent of the total turnover, gained 9.9 percent to SR135.50. Savola, a foodstuffs group, climbed 8.9 percent to SR489 after reporting a 27-percent gain in half-year net profits. Gainers outnumbered decliners in the week by 61 to 10. The market was also supported by stronger oil prices, which have been a boon to the Saudi economy, boosting investor liquidity as well as corporate earnings.