Russell US Stability Indexes™ are style-based benchmarks that offer more detail and specificity for investors, and adds a third dimension to the Russell US Style Indexes, independent from other definitions of style (i.e. growth and value). The indexes measure a portion of the market based on the sensitivity to economic cycles, credit cycles, and market volatility, referred to as stability. Stability is measured at the company level in terms of volatility (price and earnings), leverage, and return on assets. The more stable half of the index is called the Defensive Index® and the less stable half is called the Dynamic Index®.
FTSE Russell is one of the first to combine quality indicators (balance sheet and earnings-related measures) and a stock market indicator, volatility. As a result, Russell US Stability Indexes are more comprehensive than other indexes that historically focus on single measures such as dividends or return volatility.