AUTONOMOUS BLACK-LITTERMAN ENGINE
Your key is used only from your browser, straight to the provider you name. It is never sent to this site. Works with OpenAI, Groq, OpenRouter, Together, or a local Ollama (http://localhost:11434/v1, with OLLAMA_ORIGINS set). URL options: ?provider=byok&model=gpt-4o-mini&baseUrl=..., key via #key=... (fragment, not sent to any server).
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E[R] = [(τΣ)⁻¹ + PᵀΩ⁻¹P]⁻¹ [(τΣ)⁻¹Π + PᵀΩ⁻¹Q]Then a long-only, fully invested mean-variance optimum inside a 40–80% SPY tilt band, a 2pp no-trade band against current holdings, and a 10pp per-run move cap. Unchanged evidence returns the stored decision.