SoftBank Surges 11% to Clear $39, Hitting a Half-Month High.

TradingKey - OpenAI releases GPT-5.6 and ChatGPT Work, triggering an 11% surge in SoftBank's stock price and leading gains in Japanese and South Korean stock markets.

During the Asian trading session on July 10, Japanese and South Korean stock markets experienced a broad rally, with the Kospi index surging over 3% and the Nikkei 225 rising nearly 2%. SoftBank delivered the most stellar performance, far outperforming other heavyweight stocks.

Opening higher and continuing its upward momentum today, SoftBank surged 11.41%, breaking through the 6,400 yen (approximately $39) threshold, and is temporarily trading at 6,383 yen, marking a new high in nearly half a month. Meanwhile, Kioxia rose 7%, Samsung Electronics gained 4%, and SK Hynix opened higher but pared gains, currently up nearly 1%.

SoftBank Stock Price Chart, Source: TradingView

The primary driver of SoftBank's strong stock performance is OpenAI. Yesterday, OpenAI officially released its new flagship model family, GPT-5.6 (including Sol, Terra, and Luna), alongside "ChatGPT Work," an intelligent agent capable of executing complex workflows. This has given OpenAI greater confidence in its future IPO valuation, directly boosting SoftBank's net asset value and driving SoftBank's stock price to surge strongly today, leading the gains in Japanese and South Korean stock markets.