Liquidity and asset prices

What this book actually teaches

Yakov Amihud's monograph makes the case that liquidity — the ease with which an asset can be traded without moving its price — is a priced risk factor that investors demand compensation for, and that this compensation explains a meaningful portion of the cross-sectional variation in asset returns that traditional factor models leave unexplained. The book synthesizes Amihud's foundational academic research, including his widely cited 2002 paper introducing the Amihud illiquidity measure, into a structured review of the empirical and theoretical literature on liquidity risk.

The core thesis is two-pronged. First, less liquid assets earn higher average returns — investors require a liquidity premium for holding securities they cannot easily exit. Second, liquidity risk (the covariance of an asset's liquidity with overall market liquidity) earns its own risk premium separate from the level premium. Assets that become illiquid precisely when markets seize up are more dangerous than assets that are merely always illiquid, and investors price this systemic liquidity risk accordingly. Amihud's illiquidity measure — daily absolute return divided by dollar volume — is simple enough to construct from widely available data and has become a standard tool in empirical asset pricing research.

The book covers the liquidity-return relationship across equities, bonds, and international markets, drawing on a substantial body of empirical evidence. It also addresses the time-series dimension: aggregate market liquidity varies over time, and periods of sudden market-wide illiquidity (the 1987 crash, the 1998 LTCM crisis) coincide with the largest drawdowns in risk assets. This connects liquidity theory directly to financial crisis dynamics.

The weaknesses are primarily about scope and audience. This is an academic survey monograph, not an investment practitioner guide. The writing is dense, assumes graduate-level familiarity with asset pricing models, and prioritizes empirical rigor over practical application. Readers looking for rules of thumb on portfolio construction will not find them here. The 2005 publication date also means the book predates the post-2008 literature on liquidity spirals, funding liquidity, and the market microstructure research that followed the global financial crisis — all of which extended and in some cases revised the framework.

For institutional investors, quantitative analysts, and finance academics who want to understand why liquidity belongs in a factor model, this is the essential primary source. It is not accessible to generalist readers and is best read alongside Amihud's original papers rather than as a standalone introduction.

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About Yakov Amihud

Read more from Yakov Amihud and explore the full bibliography on ClearValue Books.