The Dow Jones Industrial Average (DJINDICES:^DJI) has gained 86 points in pre-market trading, suggesting a positive start to the stock market today. World markets didn't move much overnight: Europe's STOXX index fell only slightly after inflation data for the eurozone registered at a five-year low.

Federal Reserve Chairwoman Janet Yellen is scheduled to give a speech on the economy this morning in Chicago. The Fed surprised Wall Street recently by suggesting that long-term interest rates could start rising sooner than expected, and Yellen may discuss more details about that timetable in her talk today, which is scheduled to begin at 9:55 a.m. EDT. 

Meanwhile, news is breaking this morning on several stocks that could see heavy trading in today's session, including Disney (NYSE:DIS), Cal-Maine Foods (NASDAQ:CALM), and UTi Worldwide (UNKNOWN:UTIW.DL)

Disney stock was up 1.2% in pre-market trading after its Captain America: The Winter Soldier got off to a strong start at the international box office. The Marvel film raked in $75 million in its opening weekend while playing in just a few foreign markets.

Sure, that's below the $185 million that The Avengers earned in a similar release window two years ago, but it still points to a very solid run ahead for the movie once it launches this weekend in major markets including the United States and China.

Cal-Maine Foods this morning posted a 10% quarterly sales boost to $395 million. Profit also jumped to $1.78 a share, well ahead of the $1.27 the company booked a year ago. The egg producer saw higher demand for all of its products over the holiday months, in part thanks to the unusually cold temperatures around the country. Cal-Maine's future looks bright even as the weather gets back to normal, particularly given that national restaurant chains such as Yum! Brands' Taco Bell are diving into the breakfast market. Cal-Maine's stock was unchanged in pre-market trading.

Finally, UTi Worldwide today booked weaker than expected earnings results for its fiscal fourth quarter. Sales came in at $1.1 billion, a 2% decrease from the prior-year period. The shipping and logistics company also saw its quarterly loss widen to $0.15 a share from the $0.13 it booked a year ago. CEO Eric Kircher said in a press release that those weak results reflected a "lackluster global economy and difficult operating conditions." The stock was down 0.9% in pre-market trading.

Demitrios Kalogeropoulos owns shares of Walt Disney. The Motley Fool recommends Walt Disney. The Motley Fool owns shares of Walt Disney. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.