Mumbai, Sept. 29 -- Venus Pipes & Tubes Ltd, Astra Microwave Products Ltd, Firstsource Solutions Ltd and Jindal Stainless Ltd are among the other losers in the BSE's 'A' group today, 29 September 2025.Chemplast Sanmar Ltd tumbled 7.79% to Rs 387 at 14:47 IST.The stock was the biggest loser in the BSE's 'A' group.On the BSE, 12850 shares were traded on the counter so far as against the average daily volumes of 3852 shares in the past one month.Venus Pipes & Tubes Ltd lost 6.89% to Rs 1250.85. The stock was the second biggest loser in 'A' group.On the BSE, 9902 shares were traded on the counter so far as against the average daily volumes of 7371 shares in the past one month.Astra Microwave Products Ltd crashed 5.67% to Rs 985.1. The stock w...