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Risk-Free Rate

Definition

The theoretical return on an investment with zero risk, typically proxied by government bond yields.

How It Works

Used as the baseline in CAPM and bond pricing. In the US, the 10-year Treasury yield is the most common proxy.

Example

If the 10-year Treasury yields 4%, then Rf = 4% in your CAPM calculation.

Common Misconceptions

  • The risk-free rate is always constant
  • Any government bond qualifies

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FAQs

Common questions about Risk-Free Rate

Match the duration to your investment horizon. For equity valuation, the 10-year is standard.

Government bonds still carry some inflation risk and, in theory, a tiny default risk. In practice, US Treasuries are the closest approximation to risk-free because the government can tax and print money to meet obligations.

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