Mumbai, Jan. 20 -- Patel Retail Ltd, Shyam Telecom Ltd, Keynote Financial Services Ltd and Deccan Gold Mines Ltd are among the other gainers in the BSE's 'B' group today, 20 January 2026.Aarti Surfactants Ltd soared 20.00% to Rs 455.15 at 11:49 IST. The stock was the biggest gainer in the BSE's 'B' group. On the BSE, 18236 shares were traded on the counter so far as against the average daily volumes of 651 shares in the past one month. Patel Retail Ltd surged 16.44% to Rs 202.95. The stock was the second biggest gainer in 'B' group. On the BSE, 4.51 lakh shares were traded on the counter so far as against the average daily volumes of 4641 shares in the past one month. Shyam Telecom Ltd spiked 11.07% to Rs 13.44. The stock was the third bi...