Story
SoftBank Stock Slides 6% as Market Reassesses Post-OpenAI Investment

Summary
Shares of SoftBank Group dropped sharply after the tech conglomerate finalized its $30 billion investment program in OpenAI, prompting a market repricing. Rising credit risk and a broader market downturn also contributed to the decline.
SoftBank Group Corp. (TYO:9984) shares fell sharply on Friday, sliding 6.0% to ¥6,296, as investors repriced the stock following the completion of the company's landmark investment in artificial intelligence firm OpenAI.
OpenAI Deal Finalized
The sell-off came after SoftBank announced the formal execution of its final $10 billion investment tranche in OpenAI on October 1. This concludes a major $30 billion program, bringing the conglomerate's total investment in the AI startup to $64.6 billion and its cumulative stake to approximately 13%, according to a company statement.
The final payment was funded through the proceeds of a foreign currency-denominated senior notes issuance. With the significant capital outlay now complete, the market appears to be reassessing the conglomerate's valuation and future growth drivers.
AdBroader Market Headwinds
Beyond the OpenAI deal, several other factors weighed on SoftBank's stock. In the bond market, the cost to insure the company's debt has been rising, with its credit default swaps surging to their highest levels since 2023 in recent weeks. This reflects growing investor concern over the aggressive leverage strategy used to finance its large-scale AI investments.
Contributing to the negative sentiment was a minor governance issue, after the former CFO of a SoftBank subsidiary was arrested on October 1 for allegedly embezzling 170 million yen. The broader Japanese market also faced a downturn, with the Nikkei 225 index falling more than 1% on Friday as traders engaged in profit-taking after a strong advance in the previous session.
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