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Bear market

As explained in Investing for Programmers

A bear market is a sustained period in which asset prices generally decline and investor sentiment is pessimistic or fearful.

A bear market is a sustained period of broadly declining asset prices marked by pessimism, uncertainty, and fear. Falling prices create special pressure for investors who need to sell. section 7.5.1 section 5.4

A bear market changes both risk and decision-making:

  • Selling investments to fund near-term needs can lock in lower prices than would apply during a bull market. section 5.4
  • Declining prices do not affect every company equally: some may recover, while others may face permanent damage. section 7.5.1
  • Short selling treats the decline as an opportunity by borrowing shares, selling them, and repurchasing them later at a lower price. section 7.5.1

A difficult position

A holding priced 20% below its purchase price can invite hopes of a turnaround, but selling acknowledges the loss and may trigger negative emotions. The housing bubble crash of 2008 also illustrates the uncertainty of predicting declines. section 7.5.1

How Investing for Programmers covers it

How deep it goes
Defines declining prices and fearful sentiment, then applies the concept to selling decisions and short-selling mechanics.
Examples
Uses retirement withdrawals, 20%-below-purchase decisions, short selling, and the 2008 housing bubble crash as concrete cases.
What you can do after
Evaluate whether declining assets, emotional reactions, liquidity needs, or short-selling opportunities justify a particular response.
How it connects
Connects bear markets with bull markets, risk management, short selling, investor psychology, and retirement planning.

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.