Apple's impressive results lift markets

Impressive results from Apple lifted the markets to a higher open with the Dow gaining 62 points to 17,449. Nasdaq climbed 38 points to 4,719.

On the upside

Apple (Nasdaq: AAPL) impressed with record revenue and profit for the first quarter.

Freescale Semiconductor (NYSE: FSL) swung to a greater than expected profit for the fourth quarter prompting an upgrade.

United States Steel (NYSE: X) reported lower fourth quarter earnings but the results were better than expected.

On the downside

Default fears send shares of National Bank of Greece (NYSE: NBG) tumbling.

Petrobras (NYSE: PBR) reported lower third quarter earnings but did not include significant write downs.

Radware (Nasdaq: RDWR) reported higher fourth quarter earnings and revenue that topped analyst estimates but the stock price fell.

In the broad market, advancing issues outpaced decliners by a margin of more than 7 to 5 on the NYSE and by more than 5 to 3 on Nasdaq. The broader S&P 500 gained 10 points to 2039. Bitcoin lost $8 to $249.