globalen
Sustainable Investing Glossary

Sin stocks

Sin stocks are shares in companies involved in activities that are considered unethical, such as alcohol, tobacco, gambling, adult entertainment or weapons.

Ethical investors tend to exclude sin stocks, as the companies involved are thought to be making money from exploiting human weaknesses and vices. It is a relative concept, though, as different cultures have different opinions on what constitutes a sin. Although sin stocks usually include alcohol, for example, brewing beer or making a fine wine can be considered a noble tradition in various regions or countries in the world. And whereas some investors exclude weapons manufacturers on moral grounds, serving in the military can be considered an act of patriotism by others. 

Various studies show that sin stocks deliver better returns than stocks in general. There are several explanations for this. One of them is that sin stocks are undervalued because many investors avoid them. Another one is that sin industries pose increased litigation risk or reputation risk, for which investors are compensated with a risk premium.

A more recent explanation is offered by David Blitz, Head of Quantitative Research at Robeco, and Frank Fabozzi, Professor of Finance at EDHEC Business School, in their article ‘Sin Stocks Revisited: Resolving the Sin Stock Anomaly’ published in the Journal of Portfolio Management. They show that the outperformance of sin stocks can be explained by two Fama-French quality factors, ‘profitability’ and ‘investment’. The profitability factor means that stocks with a high operating profitability perform better, while the investment factor maintains that companies with high total asset growth perform worse. Sin stocks tend to have high exposure to both factors; cigarette makers, for example, enjoy high margins due to relative price inelasticity, and are restricted in how they can grow their assets.

Creating returns that benefit the world we live in
Creating returns that benefit the world we live in
Sustainable investing
SI Opener: Covid-19 puts spotlight on labor issues in the apparel industry
SI Opener: Covid-19 puts spotlight on labor issues in the apparel industry
The fashion industry has been severely affected by the Covid-19 pandemic due to its discretionary nature, impacting not only garment brands but also their supply chains.
26-11-2020 | SI Opener
Robeco earns ‘leader’ label from Morningstar for ESG
Robeco earns ‘leader’ label from Morningstar for ESG
Robeco has been named by Morningstar as a ‘leader’ for its commitment to ESG.
25-11-2020 | Insight
The link between ESG and performance: SDG Credits stands the test
The link between ESG and performance: SDG Credits stands the test
Attribution analysis shows that investing in a way that contributes to the SDGs supports financial performance.
13-11-2020 | Insight