Profitability Factor
How efficiently the business converts capital into profit and cash.
Definition
Profitability is the factor that asks how much profit the business actually generates per dollar of capital invested. A company can be cheap, growing, and well-positioned, but if it can't convert revenue into operating income or cash, none of those properties translate into shareholder value.
The profitability factor was formalized as RMW (Robust-Minus-Weak operating profitability) in Fama and French's five-factor model (2015), which extended the original three-factor model after consistent evidence that profitable firms outperformed unprofitable firms even after controlling for value and size.
Common profitability metrics include return on equity (ROE), return on assets (ROA), gross margin, operating margin, net margin, and free-cash-flow yield.
How QScoring uses it
The profitability category averages six metrics: ROE (TTM), ROA (TTM), gross margin, operating margin, net margin, and FCF yield. All are z-scored within sector, since margin levels vary enormously across industries — a 30% gross margin is unremarkable in software but excellent in retail. See the profitability section for the buyback-driven ROE caveat.