A press release said Russell and Axioma first formed a partnership in December 2009, with the creation of the Russell-Axioma Momentum Index. The four additional indexes complementing the Momentum Index are Russell-Axioma Leverage Index, Russell-Axioma Liquidity Index, Russell-Axioma Beta (Market Sensitivity) Index, and Russell-Axioma Volatility Index.
Designed to provide investors with easily implemented, true factor returns, the Russell-Axioma Factor Indexes are based upon the familiar investment universe of the Russell 1000, Russell 2000, and Russell 3000 Indexes, offering minimal exposure to other systematic “risk style” factors, according to the press release.
More information is at http://www.russell.com/Indexes/factor/.