It was down 6% yesterday, then exploded higher today! Has SoftBank boarded the AI roller coaster?

SoftBank's recent stock performance has made the meaning of “high volatility” crystal clear.
SoftBank fell 6.42% on September 2, but by September 4, its stock had surged 11.78%, closing at 5,590 yen.
Behind this move, on the one hand, is the rapid recovery in market risk appetite, and on the other, the renewed strength of the AI sector. Japan and South Korea's markets have recently been clearly driven by the semiconductor and AI supply chains, with Samsung Electronics and SK Hynix in South Korea, as well as related Japanese technology stocks, all rebounding.
SoftBank is particularly sensitive because Masayoshi Son's investment portfolio is closely tied to AI infrastructure. SoftBank-backed SB Energy is still advancing its US IPO plan, while demand for AI data centers remains a key market focus.
So SoftBank now looks more like an “AI sentiment amplifier”: when the market is excited, it rises quickly; when the market panics, it also falls hard.
For investors, what matters most is not how much the stock rises in a single day, but whether AI capital expenditures can continue to materialize.
After all, roller coasters may be thrilling, but making real money still depends on who can stay seated.#日韩股市走强软银涨近6%