LITTLE ROCK, Ark. (Arkansas Business) -- Better results from retailers like Best Buy and Urban Outfitters helped stocks see some modest gains on Tuesday.

Shares of Best Buy jumped 13 percent to $34.80, the biggest gain in the S&P 500. The electronics retailer beat analysts' predictions for earnings. Most of the growth came from cutting costs and focusing on online sales.

And Urban Outfitters jumped 8 percent to $43.19. The teen clothing retailer reported a 25 percent surge in second-quarter income as sales rose across nearly all its brands.

Tyson Foods stops buying cattle fed with Zilmax

Tyson Foods Inc. of Springdale has stopped buying cattle fed with a food additive called Zilmax, and now that drug's manufacturer is taking a second look at the product.

Two weeks ago, Tyson Foods, the country's largest meat processor, said it would stop buying cattle fed with Zilmax, which has been given to cows to beef them up before slaughter.

This comes after Tyson noticed that cows that were fed Zilmax were having trouble walking and moving.

Now, the Wall Street Journal says Zillmax's maker, Merck & Co., would temporarily stop sales to study the drug's effects.

Tyson Foods is not alone in cutting out the drug, other meat processors have done so as well. Meanwhile, China and Russia, major beer importers, have already banned imports of cattle that have used similar additives.

ASU among 3 to run delta leadership institute

Arkansas State University is one of three southern universities that will partner to run the Delta Leadership Institute, a regional leadership program from the Delta Regional Authority that focuses on issues affecting the Delta region.

The University of Mississippi and the University of Louisiana at Monroe are also involved in the program, whose mission is to "recognize, train and develop 21st century leadership skills" in participants across an eight-state region to face the global challenges.

Organizers hope these new leaders can help battle the Delta's high poverty, high unemployment, low educational attainment, and loss of skilled labor.

The opening session of the leadership program will take place starting in November in Oxford, Miss.