Opening Bell: U.S. Stocks Rise Ahead of Janet Yellen Speech; Walmart Shares Upgraded

U.S. stocks opened slightly higher on Monday, as investors gear up for a speech from Federal Reserve Chair Janet Yellen, which takes on more significance after Friday's dismal May jobs report. But experts say Yellen will likely downplay the weak numbers and take a bigger picture focus. 'I think she's just going to remind everybody that this is one data point of many that the Fed is looking at and one data point does not constitute a trend,' said David Lebovitz, global markets strategist at JPMorgan Asset Management. Meanwhile, Walmart (WMT) - Get Report shares were upgraded to BUY from HOLD by Jefferies. The analysts also raised their price target on the stock to $82 from $60. It now trades near $71 a share. Burberry's CEO Christopher Bailey is taking a huge hit to his salary - a 75 percent hit for fiscal 2016. He will receive just under 2 million pounds, compared to 7.5 million pounds during the same period last year. This comes amid falling profits and a 35 percent drop in the company's stock price over the last year. TheStreet's Scott Gamm reports from Wall Street.