Watch out for these penny stocks locked in the upper circuit on December 23 Watch out for these penny stocks locked in the upper circuit on December 23 All sectors saw selling, with the exception of pharma and healthcare. Kaustubh Bhosale / Friday, December 23, 2022 / Article rating: 3.4 On Friday, equity benchmarks fell along with sluggish global market trends, as investors' confidence remained subdued in light of the COVID surge happening in several countries.