After Monday's spectacular rally, the US markets ended Tuesday session flat. Trading was light and choppy. Health-care, utilities and materials were the best-performing sector, while Bank of America was the top gainer on the Dow. Also Read - How ADRs performed

The Dow was up 20.03 points, or 0.2%, to 10,246.97, its highest close since October 3, 2008. The S&P 500 index slipped 0.07 points, or less than 0.1%, to 1,093.01. The Nasdaq Composite Index fell 2.98 points, or 0.1%, to 2,151.08.

Crude prices dropped as the tropical depression IDA weakened, allowing workers to return to offshore platforms in the Gulf of Mexico.

Copper prices fell on speculation that demand is weakening in China. Stockpiles climbed for a sixth straight session to the highest level in six months. Among other metals, aluminum, zinc and tin rose, while nickel declined.

The dollar traded near a two-week low versus the euro ahead of Chinese economic reports that may support demand for higher-yielding assets. The dollar index is unchanged at around 75.