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Institutional Quality and the Reliability of the CMA Investment Factor

Article Quant Q&A · Author: Ahmet
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Summary

The document asks whether the Fama–French CMA investment factor is less informative in economies where capital allocation is shaped by government influence. Its premise is that firms’ investment decisions may reflect political priorities as well as market signals, weakening the factor’s interpretation as a measure of rational investment policy.

It reports two adjacent findings rather than a direct test: a thesis found size and investment factors redundant in an emerging-market sample, while research on China found the relative performance of private and state-owned firms varied with institutional quality. The author notes that these results do not establish a cross-country relationship between governance and CMA significance. The question remains open, and the evidence is suggestive rather than conclusive.

Key ideas

  • CMA assumes investment behavior reflects market-driven capital allocation.
  • State influence may cause firms’ investment decisions to depart from market signals.
  • Reported emerging-market results found the investment factor redundant in one sample.
  • Research on Chinese firms suggests ownership performance depends on institutional quality.
  • The document identifies a broad cross-country test of institutional quality and CMA significance as an open question.

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Factor investingEquitiesChina marketsStatistics
Full text
# Does the CMA (Investment) factor's reliability vary with institutional quality / state involvement in an economy?


# Does the CMA (Investment) factor's reliability vary with institutional quality / state involvement in an economy?












I used Claude (Anthropic) to help research the relevant literature and organize the structure of this post. However, the core idea presented below is my own and is not AI-generated content.

The Fama-French Investment factor (CMA) implicitly assumes that a firm's investment policy reflects a rational, market-driven capital allocation decision. This seems reasonable in markets with strong institutional frameworks, and CMA shows moderate explanatory power there (Fama & French 2015). In economies where capital allocation is frequently shaped by state influence — state ownership, politically directed credit, informal pressure on nominally private firms (e.g., China, Russia, Kazakhstan) — this assumption may not hold, since investment behavior may reflect political priorities rather than market signals. I haven't found a study directly testing this (e.g., regressing country-level CMA significance against a governance/institutional quality index across a broad panel). Two adjacent findings I did find:

A thesis using Ken French's emerging market data (26 countries, 1992–2021) found both size and investment factors redundant in that sample — unlike developed markets, where CMA typically retains some explanatory power. Separate research on China finds private-owned enterprises outperform state-owned enterprises only in high institutional-quality environments; the relationship reverses in low-quality environments — suggesting firm-level capital allocation signals are conditional on institutional context, at least for the ownership dimension.

Is this a known result, or a reasonable open question? Any pointers to relevant literature would be appreciated.

Shown in full with attribution under the source's licence. Licence: CC BY-SA 4.0 (Stack Exchange)

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.