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SoftBank Gains $61B in Market Value as Portfolio Companies Rally

SoftBank Group extended a powerful two-day rally Friday, with shares climbing 11.9% to add over $61 billion in market capitalization. The Japanese conglomerate's stock surge follows a 20% gain Thursday, driven by strength in its major holdings. Arm Holdings, in which SoftBank maintains a majority stake, jumped over 16% overnight after advancing more than 15% in the prior session. The momentum reflects broader enthusiasm around artificial intelligence infrastructure following strong earnings from chip makers. SoftBank has invested more than $30 billion in OpenAI and booked roughly $45 billion in related gains in its most recent fiscal year, contributing to investor appetite. Analysts cautioned that holding company valuations typically trade at discounts, with shareholders not always capturing full value of underlying assets. OpenAI's anticipated initial public offering could unlock additional value for SoftBank.