Tata Motor Share Price: Shares of domestic automotive companies gained in early trade on May 26. The gains made by Tata Motors and Ashok Leyland shares buoyed the Nifty Auto index. The Nifty Auto index extended gains, surging 1.38 per cent to an early high at 23,839.85 level. At the time of writing, 10 out of the 15 constituents of the Nifty Auto index traded in the green.