Russell Investments on Thursday debuted the Russell Stability Indexes, a mix of both defensive and dynamic stocks.

Russell said the new indexes “are a further evolution of investment style, featuring stability-oriented quality indicators in combination with stock price volatility.”

“We detected a need to extend the Russell Indexes’ style set as clients and investors seek indexes that, while independent from other definitions of style, are still cap-weighted and encompass the overall investible market,” said Rolf Agather, director of index research and innovation at Russell. “The Russell Stability Indexes offer investment professionals additional style investing tools that reflect market volatility as well as current economic and credit cycles.”