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🔥 The AI wave is surging! Samsung’s Q3 operating profit skyrockets 782%, surpasses 100 trillion won to set an all-time record
Samsung Electronics, the world’s largest memory chipmaker, today released its preliminary results for the third quarter of 2026. Driven by strong demand for AI-related chips, several key financial metrics hit new all-time highs:

📊 Key highlights:

• Operating profit: 107.4 trillion won (approximately $80.17 billion), up 782% year over year and beating analysts’ expectations of 106.1 trillion won. This marks the first time Samsung’s quarterly operating profit has exceeded 100 trillion won, and its fourth consecutive quarter of record-high profits.

• Revenue: 195 trillion won, up 127% year over year (compared with 86.06 trillion won in the same period last year).
• Main growth drivers: A sharp surge in prices for high-bandwidth memory (HBM) and conventional DRAM/NAND. Analysts estimate Samsung’s HBM shipments jumped nearly 50% quarter over quarter in Q3.

⚠️ Industry signals and supply-demand dynamics:

• The memory supply-demand gap is expected to persist through 2027–2028: Demand from AI infrastructure is surging, while memory chip capacity remains severely constrained.

• Micron’s results are also soaring: Micron’s latest quarterly net profit surged more than tenfold year over year to $37.7 billion. The company said customers have already booked more than 75% of its 2027 capacity, with negotiations extending into 2028.

• Pressure on downstream supply chains: Rising memory prices are benefiting semiconductor divisions, but they are also driving up component costs for downstream products such as smartphones and consumer electronics, squeezing profit margins in related divisions.

💡 As AI infrastructure construction intensifies, memory chips have become one of the most critical “hard currencies” in the computing value chain.
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Warren Buffett’s rational rules for investing: Emotions are the greatest enemy. He repeatedly emphasizes that investment success doesn’t depend on exceptionally high intelligence, but on having the right framework of knowledge and the ability to keep it from being corrupted by emotions.
A classic statement is: “You don’t need a stratospheric IQ, extraordinary business insight, or inside information to invest successfully over a lifetime. What you need is a sound framework for making decisions and the ability to keep emotions from corroding that framework. You must provide your own emotional discipline.”
At Berkshire’s annual meeting, he has also stated plainly that when making investment or business decisions, you should leave your emotions at the door. It’s fine to have emotions in life, but in investing, emotions are the enemy.
Core principles in practice
1. Treat the market as an “emotional partner” (Mr. Market)
A concept inherited from Benjamin Graham: The market quotes prices every day, sometimes in extreme optimism and sometimes in extreme pessimism. Rational investors should take advantage of its emotions rather than let themselves be led by them. Be fearful when others are greedy, and greedy when others are fearful.
2. Temperament matters more than intelligence
Buffett says that someone with an IQ of 150 would be better off selling 30 points to someone else, because investing doesn’t require genius. What you need is the ability to think independently, be patient and disciplined, and neither follow the crowd nor deliberately go against it. People with high IQs but poor emotional control often perform worse in the market.
3. Circle of competence + margin of safety + long-term holding
• Invest only in businesses you truly understand.
• Buy at a price significantly below intrinsic value (a margin of safety).
• Once you’ve bought a high-quality business, hold it for as long as possible and let compounding work.
Short-term share-price fluctuations are just noise; what truly matters is a company’s long-term business performance.
4. The first and second rules are not to lose money
“Rule No. 1: Never lose money. Rule No. 2: Never forget Rule No. 1.” Essentially, this means minimizing the risk of permanent capital loss when making decisions, rather than chasing short-term windfalls.
These principles have been repeatedly validated in bull markets, bear markets, tech bubbles, and financial crises. Markets change, but human nature—fear and greed—hardly does. That’s why a rational framework is the real moat that helps you weather market cycles. Buffett’s “rational rules for investing” remain one of the most reliable guides for ordinary people to combat market noise and build long-term wealth.
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