Sensitivity Heatmap

What Is a Sensitivity Heatmap in DCF Analysis?

A sensitivity heatmap is one of the most useful tools in stock valuation. In a Discounted Cash Flow (DCF) analysis, your intrinsic value estimate depends on several key assumptions — most importantly, the discount rate (the rate used to bring future cash flows back to present value) and the growth rate (how fast you expect the company's cash flows to grow). Change either assumption by even a small amount, and your estimated intrinsic value can shift dramatically.

A sensitivity heatmap visualizes this relationship across a range of scenarios simultaneously. Instead of producing a single number, it gives you a grid of possible intrinsic values, each corresponding to a different combination of growth and discount rate assumptions. This makes it immediately clear how confident you should be in any single estimate.

How to Read the Heatmap

The heatmap in MiniValuator is organized as a two-dimensional grid:

Rows represent variations in the discount rate (also referred to as WACC, or Weighted Average Cost of Capital). Moving down the rows increases the discount rate; moving up decreases it.
Columns represent variations in the growth rate (the terminal or near-term growth rate applied to free cash flows). Moving right increases the growth rate; moving left decreases it.
Each cell displays an intrinsic value per share calculated using that specific combination of discount rate and growth rate.

Your base case — the inputs you entered or confirmed on the DCF Inputs page — sits at the center of the heatmap. The surrounding cells show how the valuation shifts as each variable moves away from your base assumption.

Color Coding: What the Colors Mean

MiniValuator uses a three-color system to help you quickly assess each scenario relative to the stock's current market price:

Green — The intrinsic value in that cell is meaningfully above the current market price, indicating a potential margin of safety. The stock may be undervalued under those assumptions.
Yellow — The intrinsic value is close to the current market price, suggesting the stock is approximately fairly valued under those assumptions.
Red — The intrinsic value falls below the current market price, indicating the stock may be overvalued if those assumptions prove correct.

The color boundaries are calculated dynamically based on the current share price, so the heatmap always reflects real-time market context.

How to Use the Heatmap in Practice

Start by locating your base case cell at the center of the grid. Note the intrinsic value estimate and its color. Then, look outward in all directions:

Assess sensitivity. If most of the surrounding cells are also green, your valuation is relatively robust — even if your assumptions are off, the stock still appears undervalued. If the colors shift quickly from green to red as you move away from the center, the valuation is highly sensitive to your assumptions, and small errors in forecasting could flip the conclusion.
Stress test your thesis. Deliberately look at pessimistic scenarios (higher discount rate, lower growth rate). If the stock still appears fairly valued or undervalued in those cells, your margin of safety is more durable.
Identify the critical variable. If the heatmap changes color more dramatically across columns than rows (or vice versa), you can identify whether growth rate or discount rate is the more influential driver of value for this particular company.

Why Sensitivity Analysis Matters

No DCF model produces a single "correct" intrinsic value. Every assumption — growth rates, margins, discount rate — is an estimate about an uncertain future. Experienced investors treat a DCF output as a range of plausible values, not a precise answer.

The sensitivity heatmap makes this uncertainty explicit and actionable. Rather than anchoring on one number, you can evaluate whether a stock appears attractive across a wide range of reasonable assumptions. A stock that looks cheap in the center of the heatmap and across most of its green cells is a much stronger candidate than one that only looks cheap under the single most optimistic scenario.

Example Interpretation

Suppose you are valuing a mid-cap technology company. Your base case produces an intrinsic value of $85 per share against a current price of $72 — a green cell, suggesting roughly a 15% margin of safety. But looking at the heatmap, you notice that increasing the discount rate by just 1% or reducing the growth rate by 0.5% pushes the intrinsic value below $72, turning those cells red immediately.

This tells you the valuation is fragile. The stock looks cheap only under fairly optimistic assumptions, and a modest change in conditions — rising interest rates, a slight growth deceleration — could eliminate the margin of safety entirely. This context helps you make a more informed decision about position sizing and conviction level.

For more detail on the inputs that drive the heatmap, see DCF Inputs.