COST institutional options flow analysis — multi-leg block trades, dominant direction, and gamma analysis from the public options tape for September 18, 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 — 2025-09-18

Institutional flow on 2025-09-18

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

$0.0M0 trades

Trade Details

Full Analysis

😰 COST: Massive $52M Put Wall Built Before Earnings!

📅 September 18, 2025 | 🔥 Unusual Activity Detected


🎯 The Quick Take

Someone just dumped $52 MILLION on COST put options expiring tomorrow - that's 6,654x larger than average daily premium! With Q4 earnings coming September 25 and the stock trading at nosebleed valuations (54x P/E), institutions are building a massive defensive wall against potential downside. Translation: Big money is getting nervous about Costco at these levels.


🏢 Company Overview

Costco Wholesale Corporation is the world's second-largest retailer operating a membership warehouse model:

  • Market Cap: $427.1 billion
  • Industry: Retail-Variety Stores
  • Core Business: Membership-based, no-frills retail model offering bulk quantities at bargain prices
  • Employees: 350,000+ worldwide
  • YTD Performance: +4.7% (currently $952.36)

💰 The Option Flow Breakdown

📊 What Just Happened

TimeSymbolBuy/SellC/PExpirationPremiumStrikeVolumeOISizeSpotOption Price
15:33:22COSTBUYPUT2025-09-19$24M$1,0005.7K6804,950$951.69$49.30
15:33:22COSTBUYPUT2025-09-19$9.8M$9902.5K2542,480$951.69$39.45
15:33:22COSTBUYPUT2025-09-19$7.3M$1,0201.1K711,050$951.69$69.25
15:33:22COSTBUYPUT2025-09-19$5.4M$9851.6K1751,600$951.69$33.85
15:33:22COSTBUYPUT2025-09-19$3.7M$1,000758680750$951.69$49.29
15:33:22COSTBUYPUT2025-09-19$1.9M$99542346420$951.69$44.70

Total Premium: $52.1M in PUT purchases

Option Symbols:

🤓 What This Actually Means

Real talk: This is absolutely massive put buying ahead of tomorrow's expiration and next week's earnings. Let me break this down:

  • 💣 Strike Concentration: All strikes between $985-$1,020 (ALL above current price of $951.69)
  • 🎯 Deep In-The-Money Puts: ALL these puts are ITM with intrinsic values from $33.31 to $68.31
  • 📊 Volume vs OI: Volume dwarfing open interest = NEW positions being opened
  • 🔥 Unusual Score: 10/10 - Activity level that happens NEVER!
  • Timing: Expiring TOMORROW - pure event-driven positioning

Translation for us regular folks: This is massive ITM put buying with immediate intrinsic value! With strikes from $985-$1,020 all above the current $951.69 price, these puts are already profitable. Someone's either protecting huge long positions or aggressively betting on continued weakness ahead of earnings. This isn't waiting for a crash - it's already banking on the recent decline!


📈 Technical Setup / Chart Check-Up

COST YTD Chart

Looking at the YTD chart, COST shows concerning patterns:

  • YTD Return: +4.7% (lagging the S&P 500)
  • Current Level: $952.36 - struggling to hold $950
  • 52-Week High: $1,078 (hit in February - down 12% from peak)
  • Key Support: $900 (next major level if $950 breaks)
  • Max Drawdown: -17.3% (hasn't fully recovered)
  • Volatility: 23.1% (elevated for a defensive stock)

The stock peaked in March above $1,050 and has been in a steady downtrend. Volume spikes in March and June show distribution (smart money selling). Currently testing critical $950 support - a break could accelerate selling.


🎪 Catalysts

📅 Upcoming Events

🔥 Recent Developments


🎲 Price Targets & Probabilities

Based on analyst consensus of $1,110 and current put positioning:

😰 Bear Case ($900-930) - 45% chance

😐 Base Case ($940-960) - 35% chance

  • In-line earnings with cautious guidance
  • Stock consolidates at lower valuation
  • Membership fee increases offset margin pressure
  • Put Payoff: $30-60 per contract (modest gains)

🚀 Bull Case ($970+) - 20% chance


💡 Trading Ideas

🛡️ Conservative: "Wait for Dust to Settle"

Stay in cash until after earnings

  • Let the $52M put wall resolve
  • Enter COST shares if it holds $900
  • Avoid the volatility crush entirely
  • Risk: Missing potential bounce if puts are just hedges

⚖️ Balanced: "Sell the Volatility"

Sell COST Oct $920 Puts (collect ~$15 premium)

  • Benefit from elevated implied volatility
  • Comfortable owning COST at $905 effective cost
  • Monthly income strategy
  • Risk: Assignment if stock drops below $920

🚀 Aggressive: "Follow the Smart Money"

Buy COST Sep 27 $940 Puts (~$12 premium)

  • Lower cost than tomorrow's expiration
  • Captures earnings volatility
  • Aligned with institutional positioning
  • Maximum loss: $1,200 per contract

⚠️ Risk Factors

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

  • 📊 Valuation Risk: At 54x earnings, any disappointment gets punished hard
  • 🛒 Consumer Slowdown: Bulk buying suffers when wallets tighten
  • 🏪 Competition: Sam's Club gaining share with aggressive pricing
  • 📉 Technical Breakdown: MACD Death Cross signaling further weakness
  • 💰 Margin Pressure: Higher merchandise costs eating into profits

🎯 The Bottom Line

Here's the deal: When institutions drop $52 million on puts expiring TOMORROW, they're not gambling - they're either protecting massive positions or have conviction about near-term downside. This activity is literally unprecedented - 6,654x normal size!

The Action Plan:

If you own COST: Consider protective puts or trimming position before earnings

If you're watching: Wait for this put wall to resolve - don't fight the whale

If you're bearish: The smart money agrees, but premiums are expensive

Mark your calendar for September 25th - that's when Q4 earnings will either validate this massive put positioning or leave someone with a $52M lesson. With the stock at 54x earnings (way above Munger's 40x warning), membership fee increases kicking in, and aggressive expansion plans, there's a lot riding on execution.

Remember: These put buyers can afford to lose $52M - make sure your position size matches YOUR risk tolerance, not theirs! 💪


Options involve risk and are not suitable for all investors. This analysis is for educational purposes only and not investment advice. Always do your own research and consult with a financial advisor.