IREN shares surged in extended-trading on Thursday before giving back nearly all of the gains after the data center operator announced a partnership with semiconductor giant Nvidia . Nvidia and IREN will deploy up to 5 gigawatts of the chip maker's DSX-branded infrastructure designs intended to power artificial intelligence workloads throughout the Australian firm's data center facilities across the world. IREN shares climbed to around 27% as the news broke, then retreated and settled up about