Watch out for these penny stocks locked in the upper circuit on January 16 Watch out for these penny stocks locked in the upper circuit on January 16 Sectoral indices exhibit volatility, with selling pressure experienced by investors in the metals, IT and auto sectors. Kaustubh Bhosale / Monday, January 16, 2023 / Article rating: 3.7 The Nifty 50 index also witnessed a drop of 19 points, trading at 17,936 level.