Definitions for "Unsystematic risk"
The risk of price change due to the unique circumstances of a specific security, as opposed to the overall market.
It is the diversifiable risk or non-market risk of a security that stems from firm-specific factors like emergence of a new competitor, plant break-down, lawsuit, non-availability of raw-materials and so on. Events of this kind affect primarily a specific firm and not all firms in general. Hence risk arising from them can be diversified away by including several securities in a portfolio. See non-diversifiable risk.
The component of total risk that is related to a specific business or industry that can be eliminated in a diversified portfolio.
Unbundling Uniform Customs and Practices Brochure 500