‘Our investments are beginning to pay off’: AI boom brings SoftBank back into the black

SoftBank Group returned to profitability in Q4 2025 with a 248.6 billion yen profit (Oct–Dec) versus a 369 billion yen loss a year earlier, and quarterly sales rose 8% to 1.98 trillion yen. The rebound is driven largely by investment gains—most notably an ~11% stake in OpenAI after nearly $35 billion invested and a $5.8 billion sale of Nvidia stock in October—and by other strategic moves including the $6.5 billion Ampere acquisition and a pending $5.375 billion ABB robotics deal. For the nine months through December SoftBank posted a 3.17 trillion yen profit (about five times prior year) on 5.7 trillion yen sales (up ~8%), though management and analysts warn performance remains volatile and concentrated around big AI bets.

Analysis

Market structure: SoftBank’s Q4 pivot from heavy unrealized losses to a ¥248.6bn profit crystallizes a shift from pure paper NAV volatility to realized liquidity (¥5.8bn Nvidia sale + partial OpenAI monetization). Direct winners are SoftBank (9984.T / ADR SFTBY), Arm (ARM.L) and robotics/AI‑silicon suppliers; potential losers are highly leveraged AI hardware resellers whose margins depend on NVDA‑led GPU pricing. Cross‑asset: a sustained risk‑on around AI can widen corporate credit spreads for legacy hardware names, push NOK/SEK/JPY volatility, and lift implied vols on NVDA/ARM options for 3–6 months.

Risk assessment: Tail risks include a >50% markdown in private OpenAI valuation or regulators blocking the ABB robotics deal (decision window 3–9 months), any of which could swing SoftBank’s NAV by tens of billions USD. Immediate (days): share moves on headlines; short (weeks–months): regulatory outcomes and NVDA earnings; long (quarters–years): monetization of OpenAI, Arm and Ampere. Hidden dependency: SoftBank’s strength depends on continued mark‑ups of private stakes — liquidity events or margin calls would force asset sales and amplify correlation with global AI sentiment.

Trade implications: Tactical: establish a 2–3% long in SoftBank (SFTBY/9984.T) with a 6–12 month horizon, hedge with 6‑month 8–10% OTM puts sized 30–50% of notional; add 1–2% long ARM.L via 3–6 month call spreads (buy ATM, sell 25% OTM) to limit cost. Pair: long ARM.L vs short NVDA (NVDA) for 3–6 months if NVDA re‑rates above 15% in a short squeeze; trim on ARM +20–30% and stop NVDA short if NVDA falls >15% intraday. Rotate +2–4% into robotics suppliers and AI design names, reduce exposure to legacy datacenter resellers by 3–5%.

Contrarian angles: Consensus underestimates regulatory risk on the ABB robotics acquisition and overweights realized OpenAI gains as sustainable recurring earnings; historically SoftBank rallies have been followed by sharp reversals (2018–2020). The market may be underpricing a scenario where OpenAI liquidity becomes restricted and SoftBank must sell highly liquid assets into a soft AI tape — scale positions with explicit stop‑losses (20%) and prefer option‑defined risk to naked exposure.

Key Decisions for Investors

• Establish a 2–3% long position in SoftBank (9984.T / ADR SFTBY) with a 6–12 month horizon; buy 6‑month puts 8–10% OTM sized to 30–50% of the equity notional as downside insurance; add on any 10% pullback, stop‑loss at 20% from entry.
• Buy ARM (ARM.L) exposure: deploy 1–2% portfolio weight via 3–6 month call spreads (buy ATM, sell ~25% OTM) targeting +20–30% upside; take profits if ARM rallies >30% or sell into a 15% broad AI sector pullback.
• Construct a pair trade: long ARM.L vs short NVDA (NVDA) equal notional for 3–6 months if NVDA rallies >15% from current levels—use 15–20% trailing stop on the short and cap risk with 1:1 short call purchases (call hedge).
• Increase 2–4% allocation to robotics suppliers and AI‑chip design names; reduce 3–5% exposure to legacy datacenter hardware resellers vulnerable to GPU price cycles—reassess after regulatory decisions on ABB within 3–9 months.
• If regulatory approval for ABB sale is delayed beyond 6 months or OpenAI valuation guidance weakens, liquidate incremental SoftBank exposure and replace with option‑defined trades (buy protective puts or call spreads) to preserve capital.