Billionaire Ken Griffin Buys 2 Artificial Intelligence (AI) Stocks Up 1,100% and 2,200% Since Early 2023

Citadel (Ken Griffin) disclosed third-quarter purchases of 388,000 shares of Palantir (PLTR) and 128,100 shares of Robinhood (HOOD). Palantir reported Q3 revenue up 63% to $1.1 billion and non-GAAP EPS of $0.21, with management raising guidance to imply revenue growth of ~53% in 2025 but trading at a lofty 96x sales valuation. Robinhood posted Q3 revenue of $1.2 billion and GAAP EPS of $0.61, hit record funded accounts/net deposits and is rolling out Cortex, an AI assistant for paid Gold subscribers; shares trade at about 42x earnings with street EPS growth expectations ~22% annually. The piece highlights strong fundamentals and AI-driven product momentum for both names while flagging Palantir’s stretched valuation, suggesting measured exposure.

Analysis

Market structure: Citadel purchases and the article reinforce bifurcation — enterprise AI software winners (PLTR, FORR, NVDA as infra beneficiary) and mobile-first fintech winners (HOOD). Direct beneficiaries: Palantir for large-enterprise/government AI decisioning and Nvidia for compute demand; Robinhood captures Gen Z wealth transfer and retail flow. Incumbent brokers and legacy supply‑chain software vendors face share pressure; capital is rotating into AI and retail-engagement products, raising implied vols and option skews in these names.

Risk assessment: Key tail risks are regulatory (SEC scrutiny of prediction markets and AI model governance), large-client concentration for PLTR (a single contract loss could cut growth materially), and operational/data/privacy failures. Time horizons: immediate (earnings/guidance reactions in days–weeks), short-term (next 3–9 months for product monetization like HOOD’s Cortex/Cortex Gold), long-term (3–10 years for AI spend CAGR ~38% per Grand View Research). Hidden dependency: PLTR’s valuation assumes sustained multi-year government/commercial upsells; HOOD depends on converting free users to paid Gold/retention and prediction-market monetization.

Trade implications: Favor tactical longs in HOOD and defensive sizing in PLTR. Consider establishing a 2–3% long HOOD (6–12 month horizon) funded by trimming overvalued AI names; limit PLTR exposure to <=1% or synthetic exposure via tight-defined option structures. Use options: buy 6–9 month HOOD call spread sizing to <1.5% portfolio risk (target 30–50% IRR) and buy 12 month PLTR protective puts (20% OTM) if holding equity; implement a pair trade long HOOD / short PLTR equal notional to express fintech vs enterprise-valuation view.

Contrarian angles: The market focuses on headline multiples (PLTR 96x sales) and overlooks cadence: Palantir’s 63% revenue acceleration and raised guidance justify some premium but not current multiple — downside risk >50% if growth slows. Conversely, consensus may underprice Robinhood’s ability to monetize prediction markets and AI-driven retention; a regulatory blowup is the main asymmetric risk. Historical parallel: early internet brokers rallied then corrected when monetization lagged — use 10–20% stop-losses and catalyst-based rebalancing.

Key Decisions for Investors

• Establish a 2–3% long position in Robinhood (HOOD) with a 6–12 month horizon, targeting 30–50% upside if funded accounts and prediction-market volumes continue to accelerate; trim if funded accounts fall >10% QoQ or net deposits reverse.
• Cap Palantir (PLTR) exposure to <=1% of portfolio equity; do not add to a PLTR long unless price-to-sales falls below 50x or shares decline >30% from current levels; alternatively obtain downside protection by buying 12‑month 20% OTM puts sized to cover the equity notional.
• Implement a pair trade: long HOOD (2%) / short PLTR (1–1.5%) equal notional to express belief in fintech monetization vs stretched AI multiple; rebalance if relative move exceeds 20%.
• Employ options: buy a 6–9 month HOOD call spread risking <=1.5% portfolio to capture upside (select strikes ~30–50% above spot for ~2–4x payoff) and sell 6–12 month OTM covered calls on any PLTR lot to harvest premium while maintaining downside puts as insurance.
• Monitor regulatory catalysts: review SEC statements on prediction markets and any 8-Ks on Palantir government contract renewals over the next 30–90 days; pause increases in exposure until no adverse regulatory action appears within 60 days.