Hindustan Zinc shares surged 4.3% intraday, reaching Rs 632.55, driven by a sharp rise in silver prices. Conversely, Bharat Heavy Electricals Ltd (BHEL) stock fell nearly 6% to Rs 258.30 on January 12. This decline was attributed to investor concerns over potential easing of restrictions on Chinese firms bidding for Indian government contracts, which could increase competition for state-run power equipment makers.