Market Data, News & Trading

Introduction

Traders watch market data (prices, volume, depth) and news (earnings, macro data, headlines). Both move prices by changing expectations. This lesson explains how to use them wisely.

Market Data

Market data shows:

• Prices — current and historical quotes
• Volume — how much is trading
• Depth — buy/sell orders near the price
• Indicators — derived from price and volume

News Moves Expectations

Prices move when news changes what investors expect about the future:

• Earnings — better than expected pushes prices up (usually)
• Macro data — interest rates, inflation, jobs
• Headlines — geopolitics, policy, sector news

The Challenge of Trading the News

Trading the news is hard because:

• Prices react in seconds
• By the time you act, much is already priced in
• Headlines are noisy and often misleading
• Emotional reactions cause costly mistakes

A Sensible Approach

• Don't chase every headline
• Base long-term decisions on fundamentals, not daily noise
• Use news to understand why prices moved, not to predict the next move
• Have a plan and stick to it rather than reacting impulsively

Real-World Example

A company beats earnings badly. Within seconds the price jumps upward. An investor who hesitates (or tries to catch a pullback) often misses the move or buys the top. The disciplined investor had already decided what the company is worth.

Summary

• Market data shows prices, volume, and activity — not certainties
• News moves prices by changing expectations
• Markets price in news almost instantly
• Chasing headlines leads to impulsive, costly decisions
• Base decisions on a plan and fundamentals, not daily noise

Next Lesson

Now the tax and cost side, and how investors are protected.