Definition
Size Factor
The size factor reflects the historical tendency for smaller-capitalisation stocks to outperform larger ones over the long run, compensating investors for their higher risk and lower liquidity.
In India, the size premium shows up in the long-run outperformance of mid- and small-cap indices over the large-cap Nifty, albeit with far greater volatility and deeper drawdowns. Small-cap exposure also carries higher impact cost and liquidity risk, which can erode the raw premium.
The size effect is less robust than once believed and is sensitive to how junk small-caps are screened out, often using the quality factor. Indian factor and smart-beta products use size carefully, typically within a multi-cap or multi-factor framework rather than as a standalone bet.
Related terms
- Impact CostImpact cost is the percentage cost of executing a specified order size relative to the ideal mid-price, and is the liquidity measure the NSE uses to assess stocks for index inclusion.
- Factor InvestingFactor investing is the systematic targeting of securities with specific measurable characteristics, called factors, that academic research has linked to higher long-run risk-adjusted returns.
- Multi-Factor ModelA multi-factor model combines several return factors, such as value, momentum, quality and low volatility, into a single framework to score and weight securities, diversifying across drivers of return.
- Quality FactorThe quality factor targets companies with strong fundamentals, such as high and stable return on equity, low debt, and consistent earnings, on the basis that high-quality firms tend to outperform on a risk-adjusted basis.
Plain-English explainer from The Dispatch Investors Encyclopedia. General information, not financial advice.