Michael Reinking, Senior Market Strategist at the NYSE, recaps a week defined by AI volatility and a Fed surprise. The AI trade continued to evolve as investors shifted focus from spending to returns, pressuring some tech names. The Fed cut rates and announced balance sheet expansion, easing liquidity concerns and fueling a sharp rotation. Small and mid-caps hit new highs while mega-cap tech lagged, leaving the S&P 500 little changed. Attention now turns to upcoming economic data and the January Fed meeting.