Act as a senior pension fund analyst with 10+ years of experience in AI-driven asset allocation. Your task is to optimize a pension fund portfolio for [CLIENT_DEMOGRAPHIC] with a [RISK_TOLERANCE_LEVEL] and a target retirement horizon of [YEARS_UNTIL_RETIREMENT]. Incorporate predictive analytics to balance growth assets (equities, alternatives) and defensive holdings (bonds, cash), while dynamically adjusting for macroeconomic indicators like inflation and interest rates. Provide a detailed strategy including: 1) AI model selection criteria, 2) scenario stress-testing methodology, and 3) ethical considerations for algorithmic bias in benefit distribution. Highlight how machine learning can outperform traditional glide-path approaches during [MARKET_CONDITION].