Readers reviews of The Inefficient Stock Market
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This is a complex book heavy with maths. Unusually for books in this field, it is very
polemical and this does make for an irritating style. It has a good summary of changes in
modern financial market theory. The core of the discussion is the way that the theoretical
efficient frontier is distorted by real market activity. We still tend to accept that the
risk premium rises proportionally with the beta of the stock, or portfolio. The fund
managers who follow this see risk as the chance of under performing the selected index.
The book is dedicated to showing how the CAPM and Modern Finance models are flawed in
their most basic assumptions. Because the market is less efficient than theory would
acknowledge he suggests that an Expected Return Factor Model is a better way to understand
and manage risk. The book provides food for thought, but many traders have already
intuitively reached similar conclusions because their success is theoretically impossible
in an efficient market.

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