Thu, Oct 2, 2014, 5:08 AM EDT - U.S. Markets open in 4 hrs 22 mins

Doubts undermine stocks as ECB faces 1 trillion euro question

World stocks were knocked hard on Thursday after global manufacturing data and an Ebola health scare in the United States spooked markets, sending investors scurrying to the safety of U.S. European markets were sucked into the storm before the European Central Bank's monthly policy meeting where pressure is intensifying on it to launch an aggressive government bond purchase programme. Investors warmed to the yen and safe-haven bonds after a slew of surveys on Wednesday…