🌪 Stress-Test Simulator — what-if scenario engine

What this does. Apply a hypothetical shock to 5 macro factors (equity, vol, rates, dollar, commodity) and see the projected impact on a $100k equal-weight portfolio across 10 cross-asset positions. Per-asset moves use historical OLS factor betas (5y of daily Polygon data, weekly recompute) and are amplified by the current macro regime (CONTRACTION/CRISIS amplifies down-shocks; EXPANSION dampens). The Khalid Index is also reprojected. Pick a preset to start, or build a custom scenario with the sliders.