Watch out for these penny stocks locked in the upper circuit on January 20 Watch out for these penny stocks locked in the upper circuit on January 20 The Small-Cap index, increased by small margin of 35 points, trading at 28,808 level. Kaustubh Bhosale / Friday, January 20, 2023 / Article rating: 4.0 S&P BSE Sensex and NSE Nifty50 indices of Indian stock market opened modestly on Friday amid volatile trading on the international markets due to ongoing worries about sharp increase in interest rates.