India's auto index up 1.1% on GST cut hopes, 12 of 15 stocks advancing today.

• Tata Motors jumps 3%; Maruti, Hyundai, and Mahindra are flat after Monday’s strong gains in the market today.
• Brokerages predict 7% vehicle price drop if GST falls to 18%, boosting festive demand significantly.
• Top picks include Maruti, Mahindra, and Hyundai; ancillary winners SAMD, ENDU, and HAPY for strong growth prospects.