It was a losing day on Wall Street on Friday, but the major indices managed to post gains on the week, remarkable in a week that saw the worst hurricane to ever hit the US coast and a number of economic reports that were far from positive.

The Dow Jones Industrial Average lost 0.12 percent on the day to 10,447.37, although it gained 0.4 percent on the week. Meanwhile, the Nasdaq composite lost 0.32 percent for the day to close at 2,141.07, a gain of 1 percent on the week, and the S&P 500 was down 0.29 percent on the day but up 1.1 percent on the week to close Friday’s session at 1,218.02.

The oil sector made significant gains as prices rose due to closures of oil platforms and refineries as well as predictions of supply shortages. Construction companies and their materials suppliers also saw gains as it became clear that extensive rebuilding in the hurricane zone would be necessary.

The S&P 500 oil and gas refiners’ index gained 17.8 percent on the week. In individual oil stocks, ExxonMobil was down 1.3 percent on Friday but gained 4.3 percent on the week to $60.87, Sunoco fell 1.5 percent on Friday but was up 18 percent on the week, and Valero Energy gained 0.4 percent on the day and 16.6 percent on the week to $109.96.

In the construction sector, Halliburton was up 8.6 percent on the week, even though it lost 1.3 percent to close at $62.35. Retailers had a bad week, as the S&P 500 apparel retailers index fell 3.7 percent on the week and the department store index lost 4.9 percent.

Leisure sectors also saw declines, as the S&P casino index was down 5.1 percent and the hotels index lost 4.1 percent, both on concerns of the short and long-term effects of Katrina on sector business in the Southeast US.