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; sign in to read flow within the past month, upgrade to AIme Premium for today's unusual options trades without the 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

Gamma Analysis

GEX Bias
Bearish
Support
$910
Resistance
$915

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.