LONDON (Reuters) - Expectations of more central bank stimulus lifted world stocks to their highest in more than a week on Wednesday, helping investors look past a mounting coronavirus death toll and policymakers' concerns for the disease's economic impact.Stringent containment measures, alongside the billions of dollars pumped in by Chinese authorities, boosted mainland China indexes more than 1% . The bourses have already clawed back half the $700 billion market cap wiped out during Monday's..