CNN Money: Top business headlines for Jan. 10

NEW YORK (CNN) -- CNN Money's Maribel Aber has your top business and financial news on this Friday, January 10.

Tyson Foods asks hog farmers to make animal welfare adjustmentTyson Foods Inc. of Springdale said Thursday that it has asked its hog farmers to adopt new methods of raising, monitoring and euthanizing animals and said it would increase supplier inspections in 2014. The Humane Society of the United States praised Tyson's actions, and a similar one by competing meat processor Smithfield Foods, calling it a "big movement from an important company." In the letter signed by Shane Miller, Tyson's senior vice president of pork, and Dean Danilson, vice president of animal well-being programs, the company asked that its suppliers to: Use video monitoring of sows "to increase oversight and decrease biosecurity risks." Stop using manual blunt force as a primary method of euthanizing sick or injured piglets. Adopt "pain mitigation methods" to eliminate or reduce the pain associated with tail docking and castration.

It is good to be the boss! Bosses actually are happier. So says a new Pew Research Center study that found bosses are more likely to be "very satisfied" with their jobs, family life and financial situation than their underlings. And more bosses than workers say they plan to stay put, especially since nearly two-thirds think they are compensated fairly for their efforts. But when it comes to gender workplace issues, bosses and workers have roughly the same views. The overwhelming majority of both feel that men and women are paid equally at their place of employment.

Market has #jitters about Twitter Twitter is off to a terrible start in 2014 after bearish reports from several Wall Street analysts have made investors jittery. Shares of the micro-blogging service were down nearly 9% at one point, and closed down almost 4% Thursday, after Cantor Fitzgerald gave the stock a "sell" rating and Morgan Stanley labeled it as "underweight" earlier this week. On Thursday, Cowen & Co. initiated coverage on the stock with an "underperform." But Morgan Stanley's negative rating was especially worrisome, given that the bank was one of the underwriters of Twitter's November initial public offering, said Robert Peck, an analyst with SunTrust Robinson Humphrey.

Economy stinks, books get more depressingAmerican futurism gets pretty dark during bad economic times. Many people start to see technology as the enemy, like they did in the 1930s and 1970s. And people generally feel less optimistic for the future. But new research shows that it's not just futurism that becomes more gloomy during economic recessions. When the economy stinks, all authors start to adopt a more depressing vocabulary. A recent study out of London took different "mood words" that were then broken up into six categories: anger, disgust, fear, joy, sadness, and surprise. From there the researchers made what they call a "literary misery index" to gauge the relative number of positive moods against the negative moods in 20th century books.

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CNN Money: Top business headlines for Jan. 10