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Stocks opened higher on Friday, putting Wall Street on track for a fourth day of gains as Amazon Inc. rallied after strong quarterly results.

Stock euphoria over Amazon.com's (Nasdaq: AMZN) first-quarter earnings surprise sent shares of the No. 1 e-retailer soaring, triggering a big rise in the Nasdaq and other averages that eased slightly by midday.

The companies whose shares are moving in pre-market trade Friday are: Expedia, Amazon.com, Zynga Inc, Jazz Pharmaceuticals, Goodyear Tire & Rubber, Ford Motor, Western Digital, Seagate Technology, Starbucks Corp and Fedex Corp.

Stocks eyed a fourth day of gains on Friday, with Amazon the latest company to extend an earnings-driven rally that has wiped out much of the market's losses for April.

Amazon.com (Nasdaq: AMZN), the No. 1 e-retailer, reported first-quarter results that easily beat analysts? estimates because of soaring sales of its Kindle Fire tablet.

Shares of Amazon.com (Nasdaq: AMZN), the No. e-retailer, rose slightly Thursday ahead of the company?s report of first-quarter results that might beat analyst estimates.

Survival International's Fiona Watson said the Awa people of the Brazilian Amazon are the earth's most threatened tribe, occupying an island in a sea of deforestation.?

The new investor bywords are “big data.” Initial public offerings last week for both Splunk (Nasdaq: SPLK) and Proofpoint (Nasdaq: PFPT) were smash hits because of it. Big companies like IBM (NYSE: IBM) may be the biggest beneficiaries.

EBay Inc's strong first quarter bodes well for Amazon.com Inc's results next week - especially Amazon's own online Marketplace business and e-commerce in general, analysts said on Thursday.

Last month, Apple brought to the world the first Retina display tablet - the New iPad - and following on the same line, the big honchos in the tablet arena announced their plans of introducing the similar technology in their tablet brands.

Jeffrey Bezos, founding CEO of Amazon.com (Nasdaq: AMZN), froze his salary for the third consecutive year at $81,840. He also received $1.6 million in other compensation, the company’s proxy said.

The world of erotic e-books is getting more intriguing by the minute. Recent reports have explored the increasing popularity of erotic/romance novels. Women who were previously ashamed to lose themselves in smutty novels, can now do so free of judgement.

The popularity of Fifty Shades of Grey has brought new attention to the lure of erotic/romantic fiction. According to a new report by CNBC, Romance is the best-selling fiction genre.

The United States Department of Justice filed a civil antitrust lawsuit against Apple and a handful of major book publishers on Wednesday, alleging that the companies colluded to raise the price of e-books back in 2010. Amazon is the clear winner here, but it won't win out in the long-run.

U.S. Attorney General Eric Holder said Apple and publishers worked to eliminate competition. Three publishers settled the case.

Microsoft trumped Amazon, eBay and other tech giants with its more than $1 billion purchase of the majority of AOL Inc's patent trove.

Sony has announced it will be adding Amazon streaming video to the PlayStation Network. The move indicates a strong shift toward video game console-makers creating all-encompassing media devices.

The U.S. oil giant is engaged in a battle with Ecuadoran courts over $18 billion in environmental damages. While that saga continues, a judge in New York said Chevron doesn't have to pay a $21.8 million fine.

Amazon.com Inc is trying to grab some of the billions of advertising dollars spent each year by consumer packaged goods companies including Kimberly-Clark Corp, as the world's largest Internet retailer seeks new sources of revenue growth.

Amazon's app store, available on the Kindle Fire, is trumping Google Play in terms of revenue. With that the case, why does Apple still run the top store?

The competition among major vendors in the tablet market has heated up with the launch of Apple's new iPad.

Best Buy has fallen on hard times in a sluggish economy, suffering a dismal drop in sales and an overall $1.2 billion loss over the last fiscal year. The electronics giant announced Thursday that it will close 50 stores and cut 400 jobs at its Richfield, Minn., corporate headquarters, hoping to save $800 million over the next three years in order to stay afloat.

Chevron Corp. (NYSE: CVX), the second largest U.S. oil company, lost its fourth attempt to avoid paying $18 billion in environmental fines for polluting tracts of the Amazon.

Jeff Bezos, founder of Amazon.com, located the engines from the Apollo 11 rocket that brought Neil Armstrong and Buzz Aldrin to the moon in 1969 14,000 feet underwater.

Two popular tablets are getting new software updates during the final days of March, and the Amazon Kindle Fire 6.5 and Motorola Xoom both have some new features to show for it. While both tablets have their limitations, they are both in a good price range, and the new update could be just what nudges them over the line for some buyers.

Basho, a four-year-old startup, is challenging giants like Oracle (Nasdaq: ORCL) and EMC (NYSE: EMC) in the database market as well as new products for the Cloud, or Internet-based computing.

Maybe Lord Voldemort put a spell on Amazon.Com Inc.

It's reported that Amazon will release three new Kindle Fire models, each with a different resolution: a low-end 7-inch model (1204x600 resolution), a mid-tier 7-inch model (1280x800 resolution) and a high-end 8.9-inch (1920x1200 resolution).

While the new iPad remains the market leader in the media tablet segment, there is one tablet that definitely steals the spotlight -- Amazon's Kindle Fire. Rumor has it that Amazon wants a larger piece of the tablet market, and it may launch three new tablets in 2012 in an attempt to accomplish its aim.