Prism Johnson Ltd, Venkys (India) Ltd, Somany Home Innovation Ltd and Usha Martin Ltd are among the other losers in the BSE's 'A' group today, 06 January 2021. Prism Johnson Ltd, Venkys (India) Ltd, Somany Home Innovation Ltd and Usha Martin Ltd are among the other losers in the BSE's 'A' group today, 06 January 2021. PNC Infratech Ltd tumbled 7.05% to Rs 172.1 at 14:48 IST.The stock was the biggest loser in the BSE's 'A' group.On the BSE, 293.02 lakh shares were traded on the counter so far as against the average daily volumes of 22102 shares in the past one month. Prism Johnson Ltd crashed 5.72% to Rs 88.15. The stock was the second biggest loser in 'A' group.On the BSE, 1.54 lakh shares were traded on the counter so far as against the average daily volumes of 33843 shares in the past one month.