SoftBank shares plunged 10% and lost its position as Japan's most valuable company following reports that talks for a $6 billion margin loan backed by its OpenAI stake have stalled. The loan target was previously downsized from $10 billion due to creditor hesitation over valuing the unlisted OpenAI and concerns regarding its funding commitments. This decline reflects broader market anxiety over AI-related valuations and OpenAI's failure to meet ambitious internal growth targets.
