NEW YORK - Wall Street fluctuated Tuesday as investors took some reassurance from solid earnings results from blue chip names including Apple Inc. and American Express Co. but remained uneasy about the economic outlook.
Apple surpassed analysts' expectations with a 67 percent jump in fiscal fourth-quarter profit on strong sales of Macintosh computers, iPods and iPhones. The report renewed confidence in the technology sector, which has outpaced the stock market this year but which also has tended to fall the hardest when investors sell off.
And two components of the Dow Jones industrial average - American Express, one of the largest credit card companies, and chemicals …
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