India Ratings on Thursday revised its outlook on the country's base metals sector to negative from stable for the coming fiscal, stressing that the coronavirus outbreak, continuing US-China trade dispute and subdued global demand would keep prices low in the near term. Prices may gradually improve as the pandemic is contained and the second phase of US-China trade negotiations is concluded, the rating agency said in a statement. As part of its study, the agency has covered the copper, zinc, aluminium and coal sectors.