Watch out for these penny stocks locked in the upper circuit on April 18 Watch out for these penny stocks locked in the upper circuit on April 18 Stronger-than-anticipated GDP figures from China did not improve investor sentiment. Kaustubh Bhosale / Tuesday, April 18, 2023 / Article rating: 4.3 The market breadth turned strong as on BSE, 1,862 shares rose and 1,269 shares fell and a total of 121 shares remained unchanged.