SoftBank tests its own borrowing limits with $30bn bet on OpenAI
Masayoshi Son faces investor nerves with massive spending on AI investments
Masayoshi Son faces investor nerves with massive spending on AI investments

Japanese group has suffered from recent share falls and a negative outlook from rating agency S&P

Japanese billionaire Masayoshi Son’s group has already invested more than $30bn in ChatGPT maker

Retail investors alarmed by bet on further investment in OpenAI

Net profit doubles to $16bn on gains from OpenAI and PayPay holdings

Acquisition continues Masayoshi Son’s spate of artificial intelligence investments

Japanese group records $45bn gain on holding in ChatGPT maker over its financial year