SoftBank (9984.T) › Analysis

SoftBank (9984.T) stock analysis, September 25, 2025: New all-time high at ¥19,055, but RSI is overbought after a 107% YTD run

Published September 25, 2025 · updated 2025-12-29 · 9984.T chart, levels and live analysis

Key Updates

SoftBank Group continues to strengthen its AI-infrastructure position, gaining 2.12% to ¥19,055 as it details plans to build five new data centers under the Stargate project with OpenAI and Oracle. The stock shows steady upside with an impressive 107.46% return year-to-date, confirming the company’s strategic positioning in the artificial-intelligence sector.

Current Trend

The shares are in a durable uptrend, accelerating in the last month (+24.83%) and over the past six months (+131.45%). Short-term momentum is stable, up 5.51% over five days with minimal daily volatility (+0.29%). YTD return of 107.46% far outpaces the Nikkei, indicating a strong fundamental driver.

Investment Thesis

The thesis rests on SoftBank’s shift from a venture investor to a key AI-infrastructure player through strategic alliances with industry leaders. Participation in the $500 billion Stargate project positions the company as a critical partner in the AI ecosystem, which should generate long-term cash flow and lift portfolio value.

Thesis Status

The thesis is fully validated by recent developments. Detailing the construction of five data centers under Stargate moves the plan from announcement to execution, reducing execution risk. Market pricing reflects the project’s potential, but there remains upside if implementation succeeds.

Key Drivers

The main catalyst is the detail on building five AI data centers under Stargate. SoftBank’s AI expansion shapes valuation outlook for 2025, and rising energy demand from AI infrastructure adds further monetization opportunities.

Technical Picture

Price ¥19,055 sets new all-time highs with strong upward momentum. Support sits around ¥18,000-18,200, matching prior peaks. Trading volume remains elevated, confirming institutional interest. RSI is in overbought territory, but the trend stays bullish.

Bull Case

Bear Case

  • Technical overboughtness after a 107.46% YTD gain raises correction risk
  • Reliance on tech-sector volatility could trigger sharp sell-offs
  • High capital spending on AI infrastructure may strain short-term cash flow
  • Geopolitical risks in the tech sector could limit international project expansion
  • Increasing competition in AI infrastructure could compress project margins
Get a message when the 9984.T picture changes — the agent team watches the levels and the news for you.Create a free account

More 9984.T analyses