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SoftBank (9984.T) stock analysis, December 15, 2025: SoftBank tests ¥16,900 support after a 44% drop from its peak

Published December 15, 2025 · updated 2025-12-29 · 9984.T chart, levels and live analysis

Key Updates

SoftBank shares declined 4.79% to ¥16,900 since the December 12 report, extending the correction phase that began in late November. The stock has now fallen 14.56% over the past month despite remaining up 84% year-to-date. This latest decline reflects continued market concerns about AI investment profitability and valuation levels, though no new company-specific negative catalysts emerged during the period. The absence of material news suggests the selloff is primarily driven by broader sector rotation and profit-taking following the stock's doubling over the prior six months.

Current Trend

SoftBank remains in a corrective phase within a strong YTD uptrend. The stock has declined 9.41% over five days and 14.56% over one month, representing a technical correction of approximately 44% from its late-October peak of approximately ¥30,200. Despite this pullback, the stock maintains an 84% YTD gain and 103.81% six-month return, indicating the broader bull trend remains intact. Key support levels have emerged around the ¥16,500-17,000 range, while resistance sits at the ¥19,000-20,000 zone. The current price of ¥16,900 suggests the stock is testing critical support levels that could determine whether this represents a healthy consolidation or the beginning of a deeper retracement.

Investment Thesis

SoftBank's investment thesis centers on its aggressive positioning as a primary capital provider to the AI infrastructure buildout, with concentrated exposure to OpenAI (¥34.7 billion committed for 11% stake), the $500 billion Stargate data center project, and strategic acquisitions in the semiconductor and data center sectors. The company has transformed into an AI infrastructure conglomerate through its $6.5 billion Ampere Computing acquisition, majority ownership of Arm Holdings, and ongoing discussions to acquire DigitalBridge ($108 billion AUM) and Switch data centers ($50 billion valuation target). This thesis assumes AI infrastructure demand will justify massive capital deployment and that SoftBank's early positioning will generate substantial returns as AI monetization accelerates. The strategy involves concentrating capital in high-conviction AI bets while divesting other holdings, including the complete $5.83 billion Nvidia stake sale.

Thesis Status

The investment thesis faces near-term pressure but remains structurally intact. The recent 44% correction from peak reflects growing market skepticism about AI investment timelines and profitability, particularly after Oracle's disappointing results raised concerns about return on AI capital expenditure. However, SoftBank continues executing its strategic roadmap with the completed Ampere acquisition, advanced DigitalBridge negotiations, and ongoing Switch discussions, demonstrating commitment to building a vertically integrated AI infrastructure platform. The Q2 net profit doubling to ¥2.5 trillion ($16.6 billion), driven primarily by OpenAI valuation gains, validates the thesis directionally but highlights concentration risk. The critical question is whether AI infrastructure demand will materialize quickly enough to justify current valuations and SoftBank's aggressive capital deployment pace, particularly given the company's need to fund an additional ¥22.5 billion OpenAI payment by year-end 2025.

Key Drivers

The primary near-term driver is market sentiment around AI investment returns and valuation levels, which deteriorated following Oracle's disappointing quarterly results that raised concerns about AI profitability timelines. SoftBank's strategic M&A activity continues with ongoing discussions to acquire Switch data centers and DigitalBridge, which would significantly expand its data center infrastructure portfolio. The company's $5.83 billion Nvidia stake sale to fund OpenAI investments demonstrates capital prioritization toward AI software over hardware, though this decision remains controversial given Nvidia's subsequent performance. Competitive dynamics in AI, particularly Google's Gemini 3 launch raising questions about OpenAI's market position, have increased investor scrutiny of SoftBank's concentrated AI exposure. The completed $6.5 billion Ampere Computing acquisition adds semiconductor design capabilities that complement the Arm Holdings position.

Technical Analysis

SoftBank exhibits classic correction behavior within an established uptrend. The stock has retraced 44% from its late-October peak of approximately ¥30,200 to the current ¥16,900, testing the 50% Fibonacci retracement level of the six-month rally. The recent price action shows accelerating downside momentum with a 5.56% single-day decline and 9.41% five-day drop, suggesting capitulation may be approaching. Critical support exists at ¥16,500-17,000, representing the six-month breakout level and a psychological round number. A break below this zone could trigger further selling toward ¥15,000-15,500. Resistance has formed at ¥19,000-20,000, where the stock has failed multiple times since late November. Volume patterns suggest institutional distribution, though the absence of company-specific negative news indicates this is sector-driven rather than fundamental deterioration. The stock requires stabilization above ¥17,000 and reclamation of ¥19,000 to resume the uptrend.

Bull Case

  • SoftBank's $34.7 billion investment in OpenAI for an 11% stake provides direct exposure to the leading AI software platform, with Q2 net profit more than doubling to ¥2.5 trillion primarily from OpenAI valuation gains, demonstrating near-term monetization potential. Source
  • The company is building a vertically integrated AI infrastructure platform through strategic acquisitions, including the completed $6.5 billion Ampere Computing purchase, ongoing discussions to acquire DigitalBridge ($108 billion AUM in digital infrastructure), and potential Switch data center acquisition ($50 billion valuation target), creating a comprehensive ecosystem from chips to data centers. Source
  • SoftBank's participation in the $500 billion Stargate AI infrastructure project with OpenAI positions the company at the center of massive AI capital deployment, while majority ownership of Arm Holdings provides strategic leverage across the semiconductor industry as ARM architecture gains market share. Source
  • The stock's 84% YTD gain has corrected 44% from peak, creating a potential entry point for long-term AI infrastructure exposure, while the company maintains diversified holdings including significant stakes in Alibaba and other Asian tech companies providing downside protection and liquidity for continued AI investments. Source
  • Management has demonstrated conviction by selling the entire $5.83 billion Nvidia stake to fund OpenAI investments despite emotional reluctance, with CEO Masayoshi Son projecting that AI and AI robots will generate at least 10% of global GDP long-term, suggesting confidence in the fundamental thesis despite near-term volatility. Source

Bear Case

  • Extreme concentration risk in OpenAI, with over $34.7 billion committed (including $22.5 billion due by year-end 2025) to a single private company, while competitive pressures from Google's Gemini 3 and other AI models threaten OpenAI's market position and valuation, directly impacting SoftBank's largest asset. Source
  • Oracle's disappointing quarterly results and increased spending forecast have raised fundamental concerns about AI investment profitability timelines, particularly problematic given SoftBank's partnership with Oracle on multiple AI initiatives including the Stargate project, suggesting returns may take longer than anticipated. Source
  • The decision to sell the entire $5.83 billion Nvidia stake to fund AI investments appears strategically questionable in retrospect, as SoftBank divested its position in the world's most valuable company and primary AI infrastructure beneficiary to concentrate capital in private, illiquid OpenAI holdings with uncertain monetization timelines. Source
  • Aggressive M&A strategy pursuing DigitalBridge and Switch acquisitions at premium valuations (Switch seeking $50 billion including debt) increases leverage and execution risk while requiring substantial additional capital deployment at a time when AI infrastructure returns remain unproven and market sentiment has deteriorated. Source
  • Technical breakdown with 44% decline from peak and accelerating downside momentum suggests potential for further correction toward ¥15,000-15,500 levels, while the stock has become increasingly volatile and correlated with AI sentiment rather than fundamental performance, as evidenced by $100 billion in market value erosion since late November. Source
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