Through exposure to Western banks, investments in accordance with Islamic Sharia law and avoid the worst effects of the credit, and P said on Monday.
S P Global Shariah Index and 3.61 percent in the second quarter, while the world index dropped by 1.49 percent.
Shares have been hammered in the credit crisis and the impact on the U.S. mortgage market. But as Islamic law forbids payment of interest, shariah investors - most of the Gulf States in record oil profits - not to support these populations, and thus immune.
"The financial reserves, with low productivity affects other indicators, mainly because ... indexes Shariah and Shariah investors have been demonstrating," P and P said in a statement.
Originally grown in Malaysia, Islamic finance was important in the increasing interest of the oil-rich Middle Eastern investors.
Asian Development Bank believes that the total value of assets around the world in accordance with Islamic principles of finance - which is also a ban on holding of shares in producers of alcohol or pornography, as well as conventional bonds - $ 1 trillion, and said that this sector is growing 10 to 15 per cent a year.
But Islamic law does not exclude energy and oil stocks, S and P said it best in their requirements of Shariah index rises almost 20 percent of the successful oil set new records.