(Open): US markets opened higher after well-received results from Apple and other companies.
The Dow Jones rose 71.54 points to 16,471.21.
The broader S&P 500 index was up 18.95 points, or 1%, at 1,922.96 and the Nasdaq index climbed 42.41 points to 4,358.48.
Shares in Apple rose 2.2% to $101.97 after the tech giant reported better-than-expected fourth quarter results late on Monday.
Apple posted earnings of $8.47bn (£5.24bn), a 13% rise from the same period a year earlier, helped by strong sales of its new iPhone 6 models,
Harley-Davidson shares jumped more than 5% after it reported third-quarter profits of $150.1m. Although this was down from a year ago, it beat expectations.
The motorbike maker also said it sold 73,217 new bikes in the quarter, up from 70,517 a year earlier.
However, Coca-Cola shares fell 5.7% after it reported a fall in third quarter profits. Net income dropped to $2.1bn, down from $2.4bn a year earlier.
