August 1, 2014: Tata Motors which off late has been going through a lull phase is betting on its two new model launches, the Zest and the Bolt. The India's biggest automaker by revenue which dominates in the truck and buses segment has seen its market share drop to 4.2 per cent at the end of June from 10.2 per cent two years ago. Tata Motors' domestic business has posted losses in four of the last eight quarters.