MSCI Barra US Total Market Equity Model for Long-Term Investors (USSLOWL) is a multi-factor US equity risk model designed for long-horizon portfolio risk management and systematic investing strategies. The model provides daily estimates for style, industry, and country risk factors and incorporates momentum, profitability, liquidity, value, volatility, and management quality factors to support portfolio construction, risk decomposition, stress testing, and quantitative portfolio management.