Mumbai, May 13 -- Steel Authority of India Ltd, Mishra Dhatu Nigam Ltd, MTAR Technologies Ltd and Vodafone Idea Ltd are among the other gainers in the BSE's 'A' group today, 13 May 2026.Texmaco Rail & Engineering Ltd surged 13.03% to Rs 119.3 at 11:47 IST. The stock was the biggest gainer in the BSE's 'A' group. On the BSE, 18.18 lakh shares were traded on the counter so far as against the average daily volumes of 1.4 lakh shares in the past one month. Steel Authority of India Ltd soared 11.05% to Rs 195.45. The stock was the second biggest gainer in 'A' group. On the BSE, 22.07 lakh shares were traded on the counter so far as against the average daily volumes of 12.4 lakh shares in the past one month. Mishra Dhatu Nigam Ltd spiked 8.03% ...