Why does the market reward beta but not volatility, and what does equilibrium add that the no-free-lunch principle alone cannot?
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Volatility-sorted versus beta-sorted portfolios
Record that volatility-sorted portfolios show no systematic return relationship while beta-sorted ones do, write , and note it reduces to only for efficient portfolios.
Multiple betas beyond the market factor
List the added factors with their papers (book-to-market, liquidity, trading volume), the 2015 Fama-French five factors, and the 2022 Duke CFO survey shares of 83% and 29% using the CAPM.
Tradable versus merely economically relevant factors
Distinguish economically relevant factors such as unemployment from financially relevant ones, and record that applied factor models use portfolios of securities, with cutting beta through S&P futures as the example.
The CML, the SML and equilibrium
Write the CML for efficient portfolios and the SML for all securities, and contrast the CAPM's supply-equals-demand assumption with earlier no-free-lunch pricing.