Watch out for these penny stocks locked in the upper circuit on February 23 Watch out for these penny stocks locked in the upper circuit on February 23 The Sensex and Nifty50 in India swayed between gains and losses in volatile trade on Thursday, the final session of the February F&O series. Kaustubh Bhosale / Thursday, February 23, 2023 / Article rating: 4.2 The Sensex and Nifty50 in India swayed between gains and losses in volatile trade on Thursday, the final session of the February F&O series.