Mumbai, Oct. 20 -- Bonlon Industries Ltd, Shiva Mills Ltd, Gallantt Ispat Ltd. and DSJ Keep Learning Ltd are among the other losers in the BSE's 'B' group today, 20 October 2025.Spectrum Electrical Industries Ltd tumbled 15.72% to Rs 1120.05 at 14:31 IST.The stock was the biggest loser in the BSE's 'B' group.On the BSE, 35 shares were traded on the counter so far as against the average daily volumes of 199 shares in the past one month.Bonlon Industries Ltd crashed 9.10% to Rs 50.83. The stock was the second biggest loser in 'B' group.On the BSE, 1.5 lakh shares were traded on the counter so far as against the average daily volumes of 78178 shares in the past one month.Shiva Mills Ltd lost 7.19% to Rs 64.97. The stock was the third biggest...