$NVDA NEWS Nvidia stock tumbles as new Biden rule threatens new curbs on chip exports Johannesburg - Delayed Quote • ZAc Kumba Iron Ore Limited (KIO.JO) Follow Compare 33,776.00 +275.00 +(0.82%) At close: 5:00:36 PM GMT+2 Conversations Related Tickers ART.JO Argent Industrial Limited 2,603.00 -1.66% ACL.JO ArcelorMittal South Africa Limited 117.00 -4.10% ZKIN ZK International Group Co., Ltd. 0.6380 +6.85% SID Companhia Siderúrgica Nacional 1.3250 -0.38% NUE Nucor Corporation 122.29 +3.49% X United States Steel Corporation 36.41 +6.34%