Notable Wednesday Option Activity: SMR, M, RIVN

Unusually large options activity has hit Macy's and Rivian: Macy's saw 43,188 options contracts trade (≈4.3M underlying shares, about 71.2% of its 1‑month ADV of 6.1M), led by 21,172 contracts in the $20 put expiring Feb 20, 2026 (≈2.1M shares). Rivian traded 260,205 contracts (≈26.0M underlying shares, ≈66.8% of its 1‑month ADV of 39.0M), with 18,800 contracts in the $25 call expiring Jan 15, 2027 (≈1.9M shares). The concentration of activity in single strikes and expirations suggests directional positioning and potential for increased volatility and liquidity pressure in the underlying equities.

Analysis

Market structure: The concentrated flow — ~21k Feb-2026 $20 puts in M (≈2.1M shares) and ~18.8k Jan-2027 $25 calls in RIVN (≈1.9M shares) is large relative to ADV and will force dealer delta-hedging. For M, heavy put demand implies dealers will short stock into weakness, amplifying downside into any near-term negative retail prints; winners are short equity holders, distressed-credit players, and deep-value opportunists if liquidation occurs. For RIVN, dealer hedging of call buys will create near-term stock demand, benefitting EV suppliers, battery metals indirectly, and incumbent EV shorts who may be squeezed.

Risk assessment: Tail risks include Macy’s covenant stress or liquidity squeeze if organized put buying is paired with large share selling (low probability but high impact before Feb-2026); for Rivian, production or recall shocks before Jan-2027 could wipe call premia. Immediate (days–weeks) effects will be volatility and directional flow from market-makers; medium-term (3–12 months) depends on Macy’s holiday comps and Rivian production cadence; long-term (>12 months) driven by secular retail footprint rationalization and EV adoption curves. Hidden dependencies: block trades may be spreads, collars, or client hedges — flows could be skew trades rather than pure directional bets, so IV moves could outsize delta moves.

Trade implications: Implement risk-defined directional option exposure rather than naked equity; capitalize on gamma from dealer hedging while controlling drawdown. For M, prefer buying protection via Feb-2026 $20/$15 put spreads sized to risk 0.25–1.0% portfolio rather than outright shorts. For RIVN, buy Jan-2027 $25/$40 call spreads or outright long-dated calls (position 1–2% portfolio) to capture optionality while avoiding margin bleed.

Contrarian angles: The crowd may be misreading flow as pure sentiment — large blocks are often structured (synthetic longs/shorts, collars). If M’s put buying is hedging for a long position downstream, downside may be limited and put IV could collapse post-earnings; shorting IV without confirming delta moves is risky. Conversely, RIVN call buying could be long-dated volatility play — if production misses, IV may spike then collapse, so selling time premium near realized vol peaks could be profitable for nimble volatility sellers.

Key Decisions for Investors

• Establish a defined-risk short exposure to Macy's (M) by buying Feb-20-2026 $20/$15 put spreads sized to risk 0.25–0.75% of portfolio; exit or roll if M prints >= +10% from current level or if IV drops >30% post-earnings.
• Establish a 1–2% portfolio long in Rivian (RIVN) via Jan-15-2027 $25/$40 call debit spreads (limit premium to target max loss 0.5–1.0% portfolio); scale into pullbacks >10% and trim half at 2x cost.
• Implement a pair hedge: for every 1% notional long RIVN call spread, allocate 0.5% notional to short volatility on select EV peers (e.g., LCID) via near-term covered-call overwrites to offset IV spikes; reassess after quarterly production updates.
• Set automated triggers to adjust sizing: if open interest in M $20 puts rises above 3.5M underlying or IV for M rises >40% vs 30-day mean, increase protective put-spread size by 50%; if RIVN Jan-2027 call IV increases >35% vs 90-day mean, consider selling 0.1–0.3% calendar spreads to monetize premium.