Chapter 1: The Basics
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Day 6: Why Stock Prices Move
Supply, demand, and the completely irrational human heart
3 min read
📖 The Tomato Problem
Uncle Ray runs a vegetable stall. One morning he hears: floods in Maharashtra have wiped out the tomato crop. Supply just crashed.
Meanwhile, a pizza chain just announced a 50% discount week — demand just exploded.
Result: Tomatoes go from ₹20/kg to ₹80/kg overnight. A 4x price jump with zero change to the tomatoes themselves.
Stock prices work exactly the same way. Except instead of tomatoes, it's company shares. And instead of floods, it's earnings reports, CEO scandals, and geopolitical drama. 📊
Uncle Ray runs a vegetable stall. One morning he hears: floods in Maharashtra have wiped out the tomato crop. Supply just crashed.
Meanwhile, a pizza chain just announced a 50% discount week — demand just exploded.
Result: Tomatoes go from ₹20/kg to ₹80/kg overnight. A 4x price jump with zero change to the tomatoes themselves.
Stock prices work exactly the same way. Except instead of tomatoes, it's company shares. And instead of floods, it's earnings reports, CEO scandals, and geopolitical drama. 📊
The Golden Rule: Price = Demand ÷ Supply
Stock Price = The point where a buyer and seller agree to transact.
More buyers than sellers → Price goes UP
More sellers than buyers → Price goes DOWN
Balanced buyers and sellers → Price stays FLAT
Simple economics. The chaos comes from figuring out what drives buyers and sellers.
More buyers than sellers → Price goes UP
More sellers than buyers → Price goes DOWN
Balanced buyers and sellers → Price stays FLAT
Simple economics. The chaos comes from figuring out what drives buyers and sellers.
What Makes Prices Go Up?
📈 Price Rise Triggers
- Strong quarterly results
- New product launch or big contract
- Foreign investors buying (FII inflow)
- Industry getting government boost
- Interest rates falling
- India's GDP growing faster
📉 Price Fall Triggers
- Disappointing quarterly results
- Promoter selling their shares
- Regulatory trouble or court case
- New strong competitor entering market
- Global market crash (US sneezes, India gets flu)
- Fraud or accounting scandal
The Order Book — Behind the Scenes
📋 Live Order Book — "Robert's Tea Ventures" Stock
BUY ORDERS (Bids)
₹441500 shares
₹4401,200 shares
₹438800 shares
₹4352,000 shares
SELL ORDERS (Asks)
₹442300 shares
₹445700 shares
₹4501,500 shares
₹4603,000 shares
Current Market Price: ₹441–₹442 (Best bid vs best ask)
Sentiment — The Invisible Force
Sentiment = What investors FEEL about the market (often overriding logic completely)
🐂 Bullish Sentiment: "Markets are going to the moon! Buy everything!" — Greed is in charge.
🐻 Bearish Sentiment: "Everything is collapsing! Sell, sell, sell!" — Fear is in charge.
Warren Buffett's famous line: "Be fearful when others are greedy, and greedy when others are fearful."
The people doing the opposite of the crowd are usually the ones who make real money.
🐂 Bullish Sentiment: "Markets are going to the moon! Buy everything!" — Greed is in charge.
🐻 Bearish Sentiment: "Everything is collapsing! Sell, sell, sell!" — Fear is in charge.
Warren Buffett's famous line: "Be fearful when others are greedy, and greedy when others are fearful."
The people doing the opposite of the crowd are usually the ones who make real money.
🎉 Circuit Breakers — When the Market Loses Its Mind
If a stock moves more than 20% in one day (up or down), trading gets automatically halted — a "circuit breaker." It forces everyone to calm down, breathe, and reconsider before trading resumes. The entire index also has circuit breakers: Nifty falling 10% triggers a 45-minute halt. It's the financial equivalent of a timeout. 🛑
If a stock moves more than 20% in one day (up or down), trading gets automatically halted — a "circuit breaker." It forces everyone to calm down, breathe, and reconsider before trading resumes. The entire index also has circuit breakers: Nifty falling 10% triggers a 45-minute halt. It's the financial equivalent of a timeout. 🛑
🎯 Today's Takeaway:
Price = demand + supply + sentiment. Good news → buyers rush in → price up. Bad news → sellers dump → price down. Sentiment can override fundamentals in the short term. Long term, fundamentals always win. Tomorrow: Bull markets, bear markets, and what they actually mean!
Price = demand + supply + sentiment. Good news → buyers rush in → price up. Bad news → sellers dump → price down. Sentiment can override fundamentals in the short term. Long term, fundamentals always win. Tomorrow: Bull markets, bear markets, and what they actually mean!