Watch out for these penny stocks locked in the upper circuit on December 30 Watch out for these penny stocks locked in the upper circuit on December 30 The Nifty 50 index is also trading in slight gains of 31 points at 18,222 levels. Kaustubh Bhosale / Friday, December 30, 2022 0 4475 Article rating: 4.0 The domestic benchmark indices Sensex and Nifty started the last trading day of this year on a cheerful note, helped by noteworthy buying in metal and power stocks amid an overall positive trend in global equities. Read more