Watch out for these penny stocks locked in the upper circuit on December 15 Watch out for these penny stocks locked in the upper circuit on December 15 The U.S. Federal Reserve raised its benchmark interest rate by 50 basis points to 4.50 per cent, the highest level in 15 years. Kaustubh Bhosale / Thursday, December 15, 2022 / Article rating: 3.6 Amid bearish global cues, the major market indices witnessed minor losses in morning trade.