Fostered by increased OEM demand, Jamna's sales more than doubled in Q1to Rs 562.19 crs ($83.9m) compared to Rs 271.37 crs ($42.1m) in the same period a year ago. OPMs expanded too (though down sharply from 15% in Q4FY18) from 11.2% to 13.4% helped by disproportionate growth in other expenses (+80.9%). Post tax earnings climbed by a...