Has the quality of US small-cap companies declined broadly across sectors?
Core argument: Unprofitable pharma and biotech stocks tripled as a share of US small caps, from 5% in 1995 to 16% in 2021, prompting exclusion of health care entirely from the gross profit/assets quality analysis.
Examined our favorite quality metric, gross profit/assets (GP/A), over time by sector for “small” US companies, which we define as between $400M and $4B in market cap today, or the equivalent percentile rank by market cap historically. We made the decision to exclude the health-care industry entirely given the significant proliferation of unprofitable pharma and biotech stocks, which tripled in proportion from 5% of small stocks in 1995 to 16% of stocks in 2021. We were curious whether the degradation in quality still held once we excluded this mix shift impact. The chart below shows the contribution to aggregate small-cap US GP/A by sector (e.g., IT GP/A multiplied by IT proportion of total market cap). Most notable is the broad-based decline in quality from the early 2010s to today. The most impacted sectors include IT, consumer discretionary, and industrials. We find it notable that US large caps trade at a premium to the rest of the world, while the median US small cap stock.

