The World Economic Forum has started in Davos with a sense of anxiety in the air as delegates worry about turbulence in financial markets, a slowdown in China and plunging oil prices.
As global stock markets suffered another day of hefty losses and oil prices sank to fresh 12-year lows, there was a high degree of concern about the outlook for the global economy this year.
High on the agenda at the forum at the Swiss ski resort is plunging oil prices and how they are connected to China's slowing economy.
The uncertainty across markets is one factor that is preventing businesses from investing in the future, and using huge cash surpluses to finance new research and development projects, said Min Zhu, deputy managing director of the International Monetary Fund, which cut its global growth forecasts earlier this week.
Paul Singer, CEO of hedge fund Elliot Management, said banks remain too leveraged eight years on from the global financial crisis that sent the world spiralling into its deepest recession since the Second World War.
The situation within financial institutions, he said, is "still opaque, highly leveraged".
The plunge in oil prices was also identified as a growing threat to the world's goal to reduce emissions through the increase in renewable energies.
The head of the International Energy Agency, which advises oil-importing countries, said the drop in costs for oil and gas threatens to reduce government incentives to improve energy efficiency - in transportation networks, for example - as well as the installation of renewable energy plants.
Fatih Birol said energy efficiency has been driven largely not so much by environmental concerns but an interest in saving money, which is disappearing as fossil fuels become cheaper.
World governments agreed in Paris in December to limit the rise in global temperatures, a move that will require a ramp-up in the amount of energy that comes from renewable sources.
Mr Birol warned a panel of energy experts gathered in Davos: "For renewables, life will not be easy."
The head of the International Chamber of Commerce, John Danilovich, said that adapting investment to meet the lower-emissions goals in the Paris agreement will be among several struggles for global businesses this year.
"On all fronts there are major agenda items, not only economic but also with regards to sustainable development, also with regards to climate and also with regards to civil society," he said.