Investors are awaiting a vote in the U.S. Congress on health care legislation that is seen as a bellwether for the capacity of the administration of President Donald Trump to deliver on campaign promises for tax and regulatory reform. Earlier in the week, shares fell on doubts over the outlook for Trump's agenda of tax cuts and higher infrastructure spending. ANALYST'S VIEWPOINT: "The implications of the health care reform bill vote may be more pronounced when the results arrive and I would not be surprised to find the market using this vote as a proxy in their expectations for future policies to be passed," Jingyi Pan of IG said in a commentary. U.S.