Opponents feared the impact of new buildings, stadiums, ski lifts and other infrastructure on the Alpine environment.

Roy Murtadho, who began the petition, said community groups had signed in support because they feared the impact of the law on the environment.

Healthcare stocks rebounded after a selloff during the past two days as investors feared the impact on profits from the new healthcare overhaul law.

Financial market volatility ranked as the chief risk for six, while two feared the impact of a U.S. interest rate rise widely expected this week.