The U.S. stock market capped a rough month Friday, delivering its third loss in five days and extending its declines for the year.

Shake Shack, a former New York City food cart which is now a gourmet burger chain challenger to McDonald's, rocketed upon its stock market debut on Friday. Shake Shack has hit on a winning formula with millennials by serving up hormone and antibiotic-free beef, crinkle-cut fries, shakes and beer. Fifty-six-year-old founder Danny Meyer's 21% stake was worth about $390m based on the trendy company's opening day high. It served burgers free of charge on Friday to the public out of food trucks on the street outside the New York Stock Exchange, where it was trading under the ticker symbol "SHAK".

NEW YORK (AP) — Wall Street went wild for burgers Friday.

NEW YORK (AP) — It's just a forecast, and for only one of 10 industry groups in the stock market. Yet it has almost singlehandedly turned what had been a strong earnings season into a weak one.

By Sinead Carew NEW YORK (Reuters) - U.S. stocks pared earlier losses to trade little changed Friday afternoon amid a rebound in the energy sector as oil prices surged on expectations for a supply decline due to a falling rig count. The S&P energy sector was up 1.5 percent at 2:30 p.m. ET (1930 GMT) after falling as much as 1.5 percent earlier in the session. On top of this, investors may be making some changes as the month draws to a close, said Brian Lazorishak, senior portfolio manager at Chase Investment Counsel. "It seems like an oversold bounce." At 2:33 p.m., the Dow Jones industrial average fell 30.41 points, or 0.17 percent, to 17,386.44, the S&P 500 lost 0.66 points, or 0.03 percent, to 2,020.59 and the Nasdaq Composite added 8.04 points, or 0.17 percent, to 4,691.45.

By Blaise Robinson PARIS (Reuters) - European stocks dipped on Friday but posted their best monthly performance in over three years, lifted by hopes the European Central Bank's quantitative easing programme will revive the region's economic growth and corporate earnings will bounce. It has strongly outpaced Wall Street, where the S&P 500 has lost 2.2 percent since the start of the year. Morgan Stanley strategists upgraded their forecast for European earnings for the first time in three years, seeing an improvement in the region's economic momentum this year. "After four years of persistent growth disappointment, we believe that Europe is on the verge of an upgrade cycle.