COST institutional options flow analysis — multi-leg block trades, dominant direction, and gamma analysis from the public options tape for September 29, 2025. Articles older than 60 days are public; a free account reads back to 30 days, Pro to 5, and AIme Premium reads today's unusual options trades with no delay.

COST Unusual Options Activity — 2025-09-29

Institutional flow on 2025-09-29

Multi-leg block trades, dominant direction, and gamma analysis

$0.0M0 trades

Trade Details

Full Analysis

🛍️ COST Bear Put Fortress - $21.5M Defensive Wall Before Earnings! 💰

📅 September 29, 2025 | 🔥 Unusual Activity Detected


🎯 The Quick Take

Someone just dropped $21.5M on Costco put protection this afternoon! Four massive trades hit the tape at 14:31:22, with the biggest being an $11M bet on the October 10th $1020 puts. With COST trading at $909.77 and earnings looming, institutional money is building a defensive wall against potential downside. Translation: Smart money is getting nervous about Costco's premium valuation!


📊 Company Overview

Costco Wholesale Corporation (COST) operates membership-based warehouse clubs with:

  • Market Cap: $406 Billion
  • Industry: Retail-Variety Stores
  • Primary Business: Membership-based, no-frills retail model predicated on offering a select product assortment in bulk quantities at bargain prices

💰 The Option Flow Breakdown

📊 The Tape (September 29, 2025 @ 14:31:22)

TimeSymbolSideBuy/SellTypeExpirationPremiumStrikeVolumeOISizeSpotOption Price
14:31:22COSTMIDBUYPUT2025-10-10$11M$1,0201K2051,000$909.77$110.50
14:31:22COSTMIDBUYPUT2025-10-17$3.8M$1,10020021200$909.77$190.80
14:31:22COSTMIDBUYPUT2025-10-03$3.7M$99045044450$909.77$81.25
14:31:22COSTMIDSELLPUT2025-10-17$3M$1,03025326250$909.77$119.35

🤓 What This Actually Means

Real talk: This isn't your neighbor Bob trading on Robinhood! This is institutional-sized defensive positioning with surgical precision:

  • $11M on October 10th $1020 puts - Betting on/hedging against a move above $1020 (12% upside)
  • Mixed put spread activity - Both buying and selling suggests complex hedging strategies
  • Near-term focus - All expiries within 3 weeks, targeting immediate catalyst risks
  • Strike selection - All strikes ABOVE current price ($909.77) = protecting long positions

Unusual Score: EXTREME! 🔥 3050x average size - This happens maybe once a year!


📈 Technical Setup / Chart Analysis

YTD Performance Chart

COST YTD Performance

Costco's having a relatively flat year with +0.54% YTD return, significantly lagging the broader market. After peaking above $1000 in March, COST has been range-bound between $900-$950.

Key observations:

  • Current Price: $914.75 (near middle of recent range)
  • YTD Return: +0.54% (underperforming S&P 500)
  • Max Drawdown: -17.29% from highs
  • Volatility: 22.9% - moderate for a mega-cap retailer

Gamma-Based Support & Resistance Analysis

COST Gamma S/R

Current Price: $913.92

The gamma landscape reveals critical levels that explain today's massive put buying:

  • 🔴 Major Resistance: $920-$925 zone with heavy call gamma building
  • 🔵 Key Support: $910 level showing strongest put gamma concentration
  • 🟠 Upper Resistance: $950-$960 creating a ceiling for rallies
  • 🔵 Deep Support: $900 acting as major floor with significant put interest

Translation for us regular folks: Options activity shows heavy interest protecting the $910 level, with sellers ready to cap any rally above $920. The massive put buying today reinforces these defensive levels!


🎪 Catalysts

Upcoming Events

Q1 2026 Earnings - December 2025

International Expansion

Recently Completed

Q4 2025 Earnings (September 2025)

Membership Fee Increase (September 2024)


🎲 Price Targets & Probabilities

Based on gamma levels and institutional positioning:

🚀 Bull Case (20% chance)

Target: $950-$960

  • Break above $920 gamma resistance
  • Strong holiday sales surprise
  • International expansion exceeds expectations
  • Target aligns with upper gamma resistance at $950-$960

😐 Base Case (60% chance)

Target: $900-$920 range

  • Stays within current gamma bands
  • Continues range-bound trading pattern
  • Membership growth offsets margin pressures
  • Gravitates toward high gamma zone at $910

😰 Bear Case (20% chance)

Target: $870-$900


💡 Trading Ideas

🛡️ Conservative: Income Generation

Play: Sell cash-secured puts below support

Sell $900 puts (Oct 17) for ~$15 premium

Risk: Assignment at $900 (1.2% below current) Reward: $1,500 per contract if expires worthless Why this works: Strong gamma support at $900, collect premium from elevated IV

⚖️ Balanced: Put Spread for Protection

Play: Buy $920/$900 put spread (Oct 17)

Buy $920 puts, sell $900 puts

Risk: $8 per spread cost Reward: $20 max gain if below $900 Why this works: Defined risk hedge matching institutional positioning

🚀 Aggressive: Volatility Crush Play

Play: Sell $910 straddle (Oct 3 - this week!)

Sell $910 calls and $910 puts

Risk: Unlimited if big move Reward: ~$45 premium collected Why this works: Massive gamma pin at $910, volatility likely to compress


⚠️ Risk Factors

Let's keep it real - here's what could go wrong:

  • Premium valuation: Trading at 50x earnings - Charlie Munger warned about 40x!
  • Renewal rate concerns: Dropped to 92.3% from higher levels
  • Tariff threats: Potential impact on imported goods margins
  • Competition: Sam's Club and BJ's expanding aggressively
  • Market saturation: Limited room for US expansion
  • Consumer spending: Inflation pressures on discretionary purchases

🎯 The Bottom Line

Here's the deal: Today's $21.5M in put buying isn't panic - it's calculated institutional hedging ahead of uncertainty. With COST trading at nosebleed valuations (50x earnings!) and sitting near resistance, smart money is buying insurance.

If you own COST: Consider taking some profits or buying protective puts - institutions are If you're watching: Wait for a pullback toward $900 gamma support for better entry If you're bearish: The put activity validates concerns, but don't fight the $910 gamma pin

Mark your calendar: October 3rd and 10th expirations will release gamma pressure - expect movement after these dates! Watch for any membership renewal updates as the key metric going forward.

Disclaimer: Options trading involves substantial risk. This analysis is for educational purposes only and not financial advice. Past performance doesn't guarantee future results. Always do your own research!


About Costco: Costco operates a membership-based, no-frills retail model predicated on offering a select product assortment in bulk quantities at bargain prices with a $406B market cap in the retail-variety stores sector.

The Options Desk tracks the move options price into every US earnings report the week of Sep 7, next to how much each stock has actually moved on its past prints — plus the SPY, QQQ and IWM expected ranges and the gamma walls that box them in.