How deeply does Investing for Programmers cover beta?

Defines three beta ranges and illustrates them with companies, but does not derive or calculate beta from price data.

Beta

As explained in Investing for Programmers

Beta is a measure of an asset's sensitivity to movements in the overall market.

Beta measures how sensitively an asset moves with the overall market. It describes market-linked volatility, or systematic risk, rather than every risk affecting a company. section 2.4 section 7.1.3

Interpret beta as a relative movement indicator:

Beta = 1: the asset generally moves with the market. section 7.1.3
Beta > 1: the asset is more volatile than the market and may amplify market stress. section 7.1.3
Beta < 1: the asset is more stable and relatively resilient to market movements. section 7.1.3 section 7.7

NVIDIA and Walmart

A ratio comparison lists NVIDIA with a beta of 2.12 and Walmart with 0.69. The contrast fits their businesses: technology purchases may be delayed during downturns, while consumers continue buying essentials. Beta can support comparison, but company-specific risks such as mismanagement remain outside market movements. section 2.4 section 7.1.3

Table 2.3 Selected ratios of NVIDIA and Walmart

Company	Market cap	Sales	Employees	P/E	Beta
NVIDIA	3457.97B	148.51B	36,000	45.65	2.12
Walmart	779.85B	685.09B	2,100,000	41.81	0.69
Data from the Finviz platform on June 8, 2025 (for the latest data, go to https://finviz.com/quote.ashx?t=NVDA&p=d or https://finviz.com/quote.ashx?t=WMT&p=d)

Use the ratio table to compare beta alongside market capitalization, sales, employees, and P/E. section 2.4

How Investing for Programmers covers it

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Also explained in

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Build a Robo-Advisor with Python (From Scratch)Beta is a measure of an asset's sensitivity to movements in the overall market, with the market portfolio conventionally assigned a beta of one.

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Related concepts

capital asset pricing modelused by · The capital asset pricing model is a financial model that estimates an asset's expected return from the risk-free rate, market expected return, and the asset's sensitivity to market returns.
slopeequivalent to · Slope is the rate at which a dependent quantity changes relative to an independent quantity, often represented by a line’s gradient or a coefficient in a linear relationship.
volatilitymeasures · Volatility is the degree or frequency with which a quantity, condition, or system varies or changes over time.

This explainer was generated by Manning's knowledge graph from the text of Investing for Programmers. The section links point to the parts of the book it draws on.