Your Neighbour's House

Imagine you own a house.

You've lived there for years.

One morning, your neighbour sells an almost identical house for $500,000.

Suddenly, friends begin congratulating you.

"Your house must be worth around $500,000 now."

You smile.

But then you stop and think.

Nothing about your house changed overnight.

The walls are the same.

The kitchen is the same.

The bedrooms are the same.

The view is the same.

Yesterday, your house was considered worth $450,000.

Today, everyone believes it's worth $500,000.

So what changed?

Not the house.

Only people's opinion of its value.

Now imagine another neighbour sells their house a month later for $430,000.

Almost instantly, everyone in the neighbourhood begins saying,

"Property prices are falling."

Again...

Your house hasn't changed.

Only the market's opinion has.

This is one of the most important ideas in finance.

Price and value are not the same thing.

Price is the amount at which a transaction takes place.

Value is what people believe something is worth.

The market can observe price.

Value exists only in people's minds.

Financial markets work exactly the same way.

Imagine a company's shares are trading at $100.

One investor believes the business is worth $150 per share.

To them, buying at $100 feels like an opportunity.

Another investor believes the company is worth only $70.

To them, selling at $100 feels like the right decision.

Both investors are looking at the same company.

The same financial statements.

The same news.

The same economy.

Yet they arrive at completely different conclusions.

Who is right?

Perhaps neither.

Perhaps one of them.

Only time will tell.

This is why markets exist.

If everyone agreed on what an asset was truly worth, there would be no reason to trade.

Every trade happens because two people see value differently.

The market doesn't tell us the true value of a business.

It simply tells us the latest price at which two people agreed to exchange it.

Professional investors spend most of their time trying to estimate value.

Professional traders spend most of their time understanding how the market is pricing that value.

Both know one important truth:

Price changes every second.

Value changes much more slowly.

Learning to distinguish between the two is one of the biggest steps toward understanding financial markets.

Key Takeaway

Price is what someone paid. Value is what people believe something is worth. They are often, but not always, the same.

Think About It

If the market price of an asset changes every second, does that mean its true value changes every second as well?

Market Science Lab — What Would You Pay?

Choose a company you know well.

Ignore today's stock price for a moment.

Ask yourself:

→If this company were not listed on a stock exchange, what would you personally be willing to pay to own the entire business?
→What assumptions did you make?
→Why might another investor arrive at a completely different number?

The exercise isn't about finding the correct answer.