CHAPTER 1

See the Market as the “Sky”

Before watching one individual stock as if it were a single aircraft,
first examine the conditions across the entire market sky.

Watching only one stock can lead us to misread why it moved.Before you fly, look at the whole sky.

Is This Decline Really a Company-Specific Problem?

When a stock we care about falls, our first reaction is often to search for bad news about that company.

Your stock−2.0% from the previous close
Nikkei 225−2.1% from the previous close
TOPIXMost sectors are lower
Tokyo marketDeclining stocks outnumber advancers

Perhaps the company is not the problem. Perhaps the entire market simply fell.

To understand an individual stock correctly, first examine the “sky” in which that aircraft is flying.

1.Check the Major Indices

Stock indices are instruments that let us observe the market as a whole at a glance.

Nikkei 225TOPIXTSE Growth Market 250Major global indices

Looking at several indices—not just one—helps reveal whether strength is concentrated in large-cap stocks or spreading across the broader market.

An index is an instrument for asking whether today’s market sky is clear or cloudy.

2.Count Advancing and Declining Stocks

Even when the Nikkei 225 rises, not every stock is necessarily moving higher. A small number of heavily weighted companies can lift the index by themselves.

The advance is broadMany stocks are rising and capital is reaching several sectors.
Only the index is risingDecliners outnumber advancers while a few large companies support the index.
Do not look only at the height of the index. Look at the breadth of the advance.

3.Observe Trading Value and Volume

A rising price may not have staying power if few participants are involved. Trading value and volume show how much money and participation are entering the market.

Price up + active tradingThe advance may have strength because substantial capital supports it.
Price up + quiet tradingParticipation is limited, so the move may be weaker than it appears.

Observe not only the price but also the market energy behind the move.

4.Read the Weather in Each Sector

Even when the overall market is cloudy, conditions are not identical everywhere. Banks, defense companies, semiconductors, automakers and pharmaceutical companies can each show different strength.

If a stock rises together with other companies in its sector, the move may reflect not only company-specific news but also a broader flow of capital into that sector.

Whole market → Sector → Individual stock
Narrow your field of view gradually, beginning with the largest sky.

Notice Stocks Moving Against the Market

If the entire market is falling while one stock rises, that difference is an important clue.

Earnings, new orders, technology, policy, or supply-and-demand conditions may be exerting a special force on that company. Conversely, a stock falling in a rising market may be revealing company-specific weakness.

Separate the reasons a stock follows the market from the reasons it moves against it.

Check Flight: What Should You Look at First?

A stock you own has fallen 2% since the morning open.

Before selling in a hurry, inspect the sky in this order.

Why check in this order?

This sequence separates causes at the market, sector, and company levels. A decline similar to the overall market does not necessarily signal a company-specific problem. A move against the market deserves closer investigation.

🌌 ✈️ 🌬️

Continue to the Next Flight

Chapter 1 taught us to inspect the market “sky” before concentrating on an individual stock.

Chapter 1 · Sky→Chapter 2 · Wind→Chapter 3 · Capital

If two stocks fly through the same sky, why can one rise while the other falls?

Continue to Chapter 2: Reading the “Wind.”

Chapter 1 Check FlightContinue to Chapter 2Return to Q&A Board