(Reuters) -Indian carmaker Tata Motors' shares plummeted about 9% to a 14-month low on Thursday, after its third-quarter results set off growth and margin concerns for its luxury Jaguar Land Rover (JLR) segment.

This profit was independent of the fiscal incentives provided by the government under the production-linked incentive (PLI) scheme during the same period.

The stock hit the day's low of Rs 684.25. Jefferies downgraded Tata Motors from 'buy' to 'underperform'. The firm also reduced its price target to Rs 660 from Rs 930.

Indian carmaker Tata Motors fell more than 7% in early trade on Thursday after reporting a bigger-than-expected drop in quarterly profit, which pushed a slew of brokerages to slash price targets on the stock.