Valuation: What Actually Determines the Value of a Business?

Summary: When I first started learning valuation, I thought it was mainly about Excel. Building a DCF model, calculating WACC, finding beta and projecting cash flows are important, but the more I learned, the more I realized that Excel is probably the easiest part. The difficult part is answering whether the assumptions actually make sense. This article brings together key concepts in intrinsic valuation and the Discounted Cash Flow (DCF) approach, including cash flows, discount rates, beta, WACC, reinvestment, growth, ROIC and terminal value, with a focus on understanding the economics and assumptions underlying a valuation.

What Determines the Value of a Business?

According to Prof. Aswath Damodaran, intrinsic value is fundamentally driven by three things:

• The cash flows a business is expected to generate.
• How quickly those cash flows are expected to grow.
• The risk associated with receiving those cash flows.

It sounds simple.

But each of these involves several assumptions and that’s where valuation becomes more than just mathematics.

Intrinsic Valuation and DCF

Intrinsic valuation attempts to estimate what a business is worth based on its own fundamentals rather than simply what the market is currently willing to pay.

One of the most common approaches is the Discounted Cash Flow model.

In simple words:

The value of a business today is the present value of the cash flows it is expected to generate in the future.

There are two important approaches to those cash flows.

FCFF — Free Cash Flow to Firm

This represents cash flow available to all providers of capital, both debt and equity, and is generally discounted using WACC.

FCFE — Free Cash Flow to Equity

This represents cash flow available to equity shareholders and is discounted using the Cost of Equity.

One of the first lessons I learned was:

Never mix the cash flow with the wrong discount rate.

FCFF with WACC.

FCFE with Cost of Equity.

What Return Should an Investor Expect?

Once we estimate future cash flows, we need another important input:

What return should an investor demand for taking this risk?

For equity, one commonly used framework is the Capital Asset Pricing Model (CAPM):

Cost of Equity = Risk-Free Rate + Beta × Equity Risk Premium

Risk-Free Rate

The risk-free rate represents the return expected from an investment with no default risk.

However, when valuing companies across countries, simply selecting a government bond rate may not always capture the complete picture. Country risk and the company’s geographic exposure can also matter.

Equity Risk Premium

Investors generally expect an additional return for investing in equities rather than a risk-free asset.

That additional expected return is the Equity Risk Premium.

The important lesson for me:

There isn’t one universally correct discount rate.

The rate should tell a consistent story about the risks of the business.

What Actually Makes a Stock Risky?

One number that appears repeatedly in valuation is Beta.

In simple terms, beta measures how sensitive a stock is to movements in the overall market.

But beta shouldn’t simply be treated as a number downloaded from a financial website.

A company’s underlying business affects its risk.

Three factors are particularly important:

1. Type of Business

A company selling essential products may be less sensitive to economic cycles than one selling discretionary products.

2. Operating Leverage

Higher fixed costs can magnify changes in operating income when revenue changes.

3. Financial Leverage

Debt creates fixed financial obligations. More debt can magnify the impact of changes in business performance on equity holders.

This also explains why I found Bottom-Up Beta particularly interesting.

Instead of asking:

“How has this stock behaved relative to the market in the past?”

we ask:

“What businesses is this company actually exposed to, and how risky are those businesses?”

We look at comparable companies, remove the effect of their leverage to estimate business risk, and then adjust for the company’s own leverage.

Regression beta looks at the past.

Bottom-up beta tries to understand the business.

Cost of Debt and WACC

Companies don’t finance themselves only through equity. They also borrow money.

So another question arises:

How much does it cost a company to borrow?

Cost of debt broadly reflects the risk-free rate and the additional return lenders demand for taking credit risk.

For companies without a credit rating, a synthetic rating can be used to estimate default risk based on factors such as interest coverage.

Certain long-term contractual obligations can also have debt-like characteristics and may need to be considered accordingly.

Once we estimate the cost of equity and cost of debt, we can calculate WACC — Weighted Average Cost of Capital.

WACC represents the overall required return on the capital used to finance the business.

One important point is that WACC generally uses market-value weights for debt and equity rather than simply relying on book values.

My takeaway:

WACC isn’t just a formula.

It represents the cost and risk of the capital financing the business.

Getting Cash Flows Right

This was probably one of my biggest lessons while learning DCF.

A valuation can go wrong even before we apply the discount rate.

The problem may simply be the cash flows we’re forecasting.

I find it useful to think about cash-flow estimation in four steps.

1. Measure Earnings

Start with the most updated earnings and normalize them when necessary, particularly for cyclical or commodity businesses.

Reported accounting numbers also don’t always perfectly represent the underlying economics of a business.

2. Calculate Taxes

Next, estimate after-tax operating income using appropriate tax assumptions.

3. Calculate Reinvestment

Growth requires investment.

A company may reinvest through:

• Capital expenditure
• R&D
• Acquisitions
• Working capital

In simple terms:

FCFF = After-tax Operating Income − Reinvestment

4. Identify Whose Cash Flow You’re Valuing

Finally:

FCFF → Cash flow available to the entire firm

FCFE → Cash flow available to equity holders

The key lesson:

Get the cash flows right first. Then worry about the discount rate.

Growth Must Be Earned

Growth was another concept that changed how I think about valuation.

Initially, I thought growth meant choosing a reasonable percentage for the forecast. But sustainable growth isn’t just a number we assign to a company.

It needs to be supported by the economics of the business.

A company can generate growth by:

• Reinvesting in new assets.
• Expanding into new opportunities.
• Improving the efficiency of existing investments.

A useful way to think about fundamental growth is:

Expected Growth = Reinvestment Rate × Return on Invested Capital

This made one thing clear:

High reinvestment doesn’t automatically mean high-value growth.

The company also needs to earn an adequate return on that reinvestment.

Why Historical Growth Can Mislead

Historical growth can provide useful context.

But it isn’t always a good forecast of the future.

Growth can change depending on:

• What financial measure we use.
• The period selected.
• The starting year.
• The method used to calculate growth.

A company growing from an unusually weak base can show an impressive growth rate that may not be sustainable.

Similarly, when earnings move from negative to positive, a conventional percentage growth rate becomes meaningless.

Management and analyst estimates can also provide useful information, but they should be treated as inputs to evaluate rather than numbers to blindly accept.

The real question should be:

Can the company actually generate the growth we’re assuming?

Growth, Reinvestment and Returns

Consider two companies that both reinvest 50% of their earnings.

If one earns a 10% return on that investment and the other earns 30%, should we expect the same growth?

Probably not. The amount reinvested matters.

But the return earned on that reinvestment matters just as much.

This is why Return on Invested Capital (ROIC) becomes important.

A simplified relationship is:

ROIC = After-tax Operating Income ÷ Invested Capital

A company that consistently earns returns above its cost of capital can create value through growth.

This also explains why competitive advantages matter.

The longer a company can maintain superior returns on capital, the longer it may be able to create value from growth.

But extraordinary returns rarely remain extraordinary forever.

Competition eventually matters.

Terminal Value: What Happens After the Forecast?

We cannot realistically forecast a company’s cash flows year by year forever.

But businesses can continue operating beyond our explicit forecast period.

So what happens after Year 5 or Year 10?

That’s where Terminal Value comes in.

Terminal value captures the value of the cash flows beyond the explicit forecast period.

There are different approaches.

One is liquidation value, where the business is assumed to end and its assets are sold.

Another is the going-concern approach, where the company continues operating and its cash flows grow at a stable rate.

A third approach is applying a future market multiple. But there is an important distinction.

Using an exit multiple essentially introduces a relative-valuation approach into the terminal period.

For an intrinsic DCF, the stable-growth approach is particularly interesting because it forces us to ask:

What does this business look like when it becomes mature?

Stable Growth Must Be Sustainable

This is where terminal value can become dangerous.

If we assume a company will grow at a very high rate forever, the valuation can become unrealistic very quickly.

A company cannot permanently grow faster than the economy in which it operates.

Therefore, the perpetual growth rate needs to be economically sustainable.

But stable growth isn’t only about reducing the growth rate.

The company itself should also become more stable.

Its:

• Risk may decline.
• Beta may move toward a more mature level.
• Capital structure may change.
• Cost of capital may stabilize.
• Returns on capital may move closer to competitive levels.

In other words:

Stable growth should represent a stable business.

The Biggest Lesson: Assumptions Drive Valuation

After going through these concepts, one thing has become very clear to me.

A DCF model can look extremely sophisticated and still produce a poor valuation.

You can have:

• Perfect Excel formulas.
• Beautiful formatting.
• Detailed financial statements.
• A complicated model.

But if the assumptions don’t make economic sense, the final number doesn’t mean much.

That’s why I now see valuation differently.

It isn’t about finding one perfect number.

It’s about building a reasonable story about the business and translating that story into financial assumptions.

The numbers should support the story.

And the story should be supported by the economics of the business.

Final Thoughts

I started learning valuation because I wanted to understand financial models.

But the more I learn, the more I realize that valuation is much bigger than modelling.

It sits at the intersection of:

Accounting + Finance + Economics + Business Understanding

Accounting tells us what happened.

Financial analysis helps us understand why it happened.

Valuation asks:

What could those numbers mean for the future?

And that requires judgment.

I’m still learning, so I don’t see this as a definitive guide to valuation.

It’s simply my attempt to bring together the concepts that have helped me understand valuation better so far.

The questions I now find myself asking are:

• How much can this business realistically grow?
• How much does it need to reinvest to achieve that growth?
• What return can it earn on that investment?
• How risky are those future cash flows?
• What happens when extraordinary growth eventually ends?

For me, these questions are more important than memorizing any individual formula.

Because perhaps the real purpose of valuation isn’t to predict the future perfectly.

It’s to make better judgments about what the future could be worth.

Note: The concepts discussed in this article are based on my learning from Prof. Aswath Damodaran’s valuation material, along with my own understanding while learning the subject.