text: A firmer dollar in the aftermath of the first Clinton-Trump presidential debate helped send gold prices lower.
  The Dow Jones Average was up 0.74% to 18,174, while the more tech-related Nasdaq rose 0.92% to 5,284. The broader S&P 500 index gained 0.64%.
  Stronger consumer confidence data helped to boost retail stocks.
  High street firms Macy's and Best Buy gained 1% and 2% respectively.
  Technology shares were strong, with Facebook and Google parent Alphabet both rising 1.1%, and Amazon adding 2.1%.
  Oil-related shares retreated on lower crude prices, with Anadarko Petroleum losing 0.5% and Halliburton down 1%.
target: (Close): US markets closed higher, led by technology and consumer sectors, while oil prices fell on fading hopes of an Opec deal to limit output.