American business leaders worry about the same major risks as they did in 2014, however rising levels of concern over cyber risks and the ability to attract and retain talent have shifted the ranks in some subtle and no-so-subtle ways. 1. Medical Cost Inflation - Medical cost inflation still leads the list of top perceived risks despite a nearly 10 percentage point drop in general concern from 67% in 2014 to 60% in 2015. 2. Cyber Risks - Making the greatest leap from fifth in 2014 to second this year, concern over cyber risk has grown considerably, particularly among large businesses. In fact, 9 out of all 10 industries surveyed report cyber risks and data breaches among their top 5 concerns.