Harley-Davidson's results rev stocks.

The stock market notched its sixth gain in a row Tuesday as more U.S. companies report solid earnings. It's the longest winning streak since September.

Netflix rose 7 percent after the video streaming service said earnings soared. Harley-Davidson jumped 6 percent after the company reported its motorcycle sales rose.

The S&P 500 climbed 7 to close at 1,879. The Dow Jones industrial average rose 65 to 16,514. The Nasdaq gained 39 to 4,161.

Sales of existing U.S. homes slipped in March to their lowest level since July 2012 as rising prices and a tight supply discouraged many would-be buyers.

The National Association of Realtors says sales edged down 0.2 percent to a seasonally adjusted annual rate of 4.59 million. It was the seventh drop in the last eight months. The group says the scant decline shows sales are stabilizing and may strengthen as the spring season picks up.

Boeing is set to release its first-quarter financial results for 2014 on Wednesday. Analysts expect a dip in profits and negative cash flow associated with 787 Dreamliner production. The aircraft is built in North Charleston and Everett, Wash.

AT&T says its first quarter earnings were unchanged from the first three months of last year, but revenue grew as the wireless business added more than 1 million subscribers.

First-quarter net income was $3.7 billion. Revenue grew 4 percent to $32.5 billion, better than the $32.4 billion analysts expected, according to FactSet.

AT&T said Tuesday it added 1,062,000 wireless subscribers in the quarter.

McDonald's reported a lower profit for the first quarter as the world's biggest hamburger chain saw global sales remain weak. Revenue edged up to $6.7 billion.

The chain said global sales rose 0.5 percent at established restaurants. In the U.S., the figure fell 1.7 percent. The company cited "challenging industry dynamics and severe winter weather."

For the quarter ended March 31, net income fell to $1.2 billion from $1.27 billion. McDonald's noted the year-ago results were boosted by tax benefits.

Comcast's first-quarter net income rose by nearly a third as ad revenue surged at broadcast network NBC, helped by the Winter Olympics in Sochi and Jimmy Fallon's elevation as host of "The Tonight Show."

Net income rose to $1.87 billion. Revenue grew 14 percent to $17.41 billion, higher than the $16.99 billion expected by Wall Street analysts.

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Tuesday Morning Corp. and former CEO Kathleen Mason have agreed to settle a discrimination lawsuit that accused the retailer of firing the executive because she revealed she had breast cancer.

Mason's attorney and Tuesday Morning, each said they had amicably resolved the matter, but did not disclose terms.

Mason sued the housewares and home decor company in May, claiming she was fired months after she told the board of her cancer. The company called the allegations meritless.

General Motors is adding 35 product safety investigators as part of a larger restructuring in response to a series of safety recalls. GM says that will more than double the size of its current team, to 55.

An official said the changes were made to ensure that potential problems are spotted and handled more quickly. The government is investigating why it took GM more than a decade to recall cars with a defective ignition switch.

Wire reports