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Security

As explained in Investing for Programmers

A security is a tradable financial instrument representing an ownership interest, creditor relationship, or other financial claim.

A security is a tradable financial asset representing ownership, a creditor relationship, or another financial claim. Stocks and bonds are securities; investors monetize them through capital appreciation or passive income. section 1.2

Evaluate a security by considering:

  • Risk tolerance, financial goals, and the time required to manage the strategy. section 1.2
  • Liquidity, capital requirements, maintenance, and scalability compared with physical or non-fungible assets. section 1.2.9
  • Income and price growth separately: dividends provide passive income, while selling above the purchase price creates a realized gain. section 1.2.1

Apple dividend comparison

In June 2025, Apple traded near $213.55 per share and paid roughly $0.26 quarterly, a dividend yield of about 0.49%. A 10-year US Treasury yield near 4.3% provided a useful comparison, showing why dividend income alone may not justify the stock’s risk. section 1.2.1

How Investing for Programmers covers it

How deep it goes
Defines securities and compares their returns, risks, and liquidity, while deferring structured investment-thesis development.
Examples
Uses Apple shares, dividends, a 10-year US Treasury bond, real estate, and art to compare securities with other assets.
What it assumes
Starts from the basic asset distinction and teaches risk tolerance, financial goals, and management time from an investor’s starting point.
What you can do after
Evaluate securities against risk tolerance, financial goals, management time, liquidity, income, and potential price appreciation.
How it connects
Connects securities with stocks, bonds, portfolios, dividends, capital appreciation, passive income, and risk tolerance.

Related concepts

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.