The news of the hiring, just a week after Kodak unexpectedly tapped its credit line, heightened worries about the viability of the company's turnaround plan.
Brent crude fell by 3% to below $52 a barrel, as cuts to monthly oil selling prices for European buyers by Saudi Arabia heightened worries about oversupply.
The turmoil has heightened worries about how states and towns, particularly poorer ones, will pay their bills as a weakening housing market and potential recession squeeze tax revenues.
The airline was also plagued with smaller mishaps on domestic flights that cost no lives but heightened worries about the company and its future.
The killings heightened worries about how the coalition troops, who are training members of the Afghan Army and the police, can protect themselves while working at close quarters with their Afghan counterparts.
But recently, there have been heightened worries about how coalition troops can protect themselves while training members of the Afghan Army and the police, especially as the number of foreign forces in Afghanistan begins to decrease.
The most recent high-level exit at the bank — that of the co-chief operating officer, Frank J. Bisignano, regarded within JPMorgan as something of an operational wizard — has heightened worries about the persistent executive turnover at the bank and raised fresh questions about who is ready to succeed Mr. Dimon one day.
But at a news conference a few hours later, officials from the power company said that the pressure had stabilized and that they had decided they did not need to release the gases immediately, which would have heightened worries about wider contamination among the population.
"We receive, or have access to bulletins from ABIN [Brazil's intelligence agency] of possible threats, which haven't yet changed," Beltrame said, referring to heightened worries about vulnerability to terrorism in the wake of the attacks in Paris last week.
This heightens worries about possible job losses, a particularly troubling concern when the United States find itself in the worst global recession in a generation.
Recent policy changes have caused heightened worry among scientists.
