Watch out for these penny stocks locked in the upper circuit on August 21 Watch out for these penny stocks locked in the upper circuit on August 21 The Sensex and Nifty indices have posted gains of 0.48 per cent and 0.46 per cent respectively. Vaishnavi Chauhan / Monday, August 21, 2023 / Article rating: 4.1 A broader market sentiment analysis indicates that around 2091 stocks are advancing, while 1502 stocks are witnessing declines, implying an overall optimistic sentiment across the broader market landscape.